Talk:Magnesium/Archive 1

Archive 1

Archive 2

Insufficient magnesium

I totally disagree with the statments about insufficient magnesium intake, an healty person will very rarly be affected by severe symptoms, see source: Centre Evian pour l'eau (in French) I'm looking for an English source, but what they say is: "Acute deficiency is rare. It is never due to an insufficiency of food contribution. It is the fact of various specific diseases whose majority are rare." --Astrowob 00:22, 17 Apr 2005 (UTC)

Your quote refers to "acute deficiency". But there is ample evidence that hypomagnesemia is common. See for example this Feb 2005 article in the Journal of Family Practice, including the footnotes referring to several relevant studies/papers.

The powder used in athletics is not the metal User:JCWF

Althetic chalk is made of magnesium carbonate. Please fix the article is it states that the metal form of magnesium is used. --mav

The article says that "Once ignited, it is difficult to extinguish, being able to burn in both nitrogen (forming magnesium nitride), and carbon dioxide."

The titanium article on this website says that only titanium can burn in nitrogen. Can magnesium not burn in a pure nitrogen atmosphere, but can still burn nitrogen when its in the air? If so, then this should be made more clear.

Google found a number of "elements" pages that repeat the claim that only titanium burns in nitrogen. But there is a US Dept of Energy handbook on spontaneous heating and pyrophoricity that claims "Magnesium may also burn in an atmosphere of nitrogen to form magnesium nitride." [1] (http://www.eh.doe.gov/techstds/standard/hdbk1081/hbk1081c.html) The same page mentions titanium as also having this property. Both metals burn in a CO2 atmosphere as well. Anyway, I tend to believe this reference. It looks like the titanium article needs updating if the DoE handbook is correct. If people have lingering doubts, maybe someone with access to CRC or some other source could find a corroborating authoritative reference. The autoignition temperature for magnesium is nowhere close to 4000 F. It is a mere 1205 F, which corresponds to 652 C or 925 K.

Also, magnesium is the 6th most abundant metal according to Dr. Doron Aurbach of the Bar-Ilan University in Israel. Dr. Doron Aurbach is currently working on rechargeable magnesium batteries and has previously discovered several improvements to the Lithium-Ion battery used in most cell phones and other mobile devices this very moment.

I have also done my research on magnesium since I wrote an entire essay (4000 words), and its ability to combust in an atmosphere of carbon dioxide, or even within solid carbon dioxide, more commonly known as dry ice. This essay was checked for accuracy by two experts at the University of Helsinki. To the point, my sources also indicate that magnesium can burn in an atmosphere of nitrogen, as can titanium.

[edit] Insufficient magnesium I totally disagree with the statments about insufficient magnesium intake, an healty person will very rarly be affected by severe symptoms, see source: Centre Evian pour l'eau (in French) (http://www.centre-evian.com/dossier_presse/index.html?contenu-medias.html?http://www.centre-evian.com/dossier_presse/dos-media/11132.html?http://www.centre-evian.com/dossier_presse/dos-media/11132.html) I'm looking for an English source, but what they say is: "Acute deficiency is rare. It is never due to an insufficiency of food contribution. It is the fact of various specific disease

i love the info. your giving but try to give it more"curb-appeal".

Uses

The extremely high temperature at which magnesium burns makes it a handy tool for starting emergency fires during outdoor recreation. Some camping equipment suppliers sell a small block of magnesium with a flint strip on one side. It is used to make camp and emergency fire. You shave the magnesium with a knife, then strike the flint with the blade to ignite it.

Description from Cabelas: This handy tool consists of a small block of solid magnesium, with a full-length flint sparking insert set into one edge. The soft magnesium is scraped with a pocket knife into a small pile, which is ignited by scraping the edge of the sparking insert with the knife. Ignites to a temperature of 5,400°F, more than enough to light the most stubborn campfire. Works even if wet. PrometheusX303 23:01, 3 March 2006 (UTC)

See also

this should probably state that its 70% of the proven reserves, as 70% of the earth's Iron and Magnesium ore is somewhat presumptuous - NDR

You are correct. The article is wrong. If you look at El Mutún it says theres 40 billion tons of Iron there while it says that total world reserves are 230 billion tons. 40/230 = 17%. I removed this statement as it is clearly wrong. Dr. Morbius 01:42, 14 February 2007 (UTC)

Magnesium and diabetes

Low blood serum levels of magnesium are found in a disproportionaly high number of diabetics. ‹The template Talkfact is being considered for merging.›  --41.241.193.144 13:09, 12 February 2007 (UTC)

Al-induced magnesium depletion

Aluminium can deplete magnesium (and calcium) ‹The template Talkfact is being considered for merging.›  --41.241.193.144 13:09, 12 February 2007 (UTC)

El Mutun as a source of Magnesium ore?

I have looked at several sources on this topic and have been unable to find anything to corroborate that El Mutun contains Magnesium ore. El Mutun contains large quantities of Magnetite which is an iron ore. Perhaps this was misread as Magnesite which is a Magnesium mineral. Please provide a source for this statement. If one is not provided I will remove this reference. Dr. Morbius 01:04, 14 February 2007 (UTC)

Ok I'm removing the reference to El Mutun since no one has been able to provide any evidence to it being a source of Magnesium or Magnesium ore. Dr. Morbius 20:23, 26 February 2007 (UTC)

Magnalium redirect

The article magnalium currently redirects to magnesium. Magnalium refers to an alloy of magnesium and aluminum that is commonly used in engineering and pyrotechnics. I am considering creating a separate article for this alloy. What do other users think? --Pyrochem 06:33, 25 February 2007 (UTC)

Go for it. Never ask for permission to ADD to Wikipedia. Be BOLD (WP:BOLD). If you know enough to even start a stub which has material which would be too specialized for magnesium, go for it. I'm already thinking the magnesium article has a little too much about mag wheels and so on, in it, and a lot of this material could use offloading to a main article on magnalium or magnesium alloys (with a magnalium section), and leave just a short summary and redirect in the element article. Rather as is done for iron and steel.SBHarris 07:41, 25 February 2007 (UTC)

Solubility of Mg(OH)₂

You state that "So-called "milk of magnesia" is a water suspension of one of the few insoluble magnesium compounds, magnesium hydroxide;" how therefore is it possible for this insoluable compound to form an aqueous soloution "Magnesium (solid) + steam → Magnesium hydroxide (aqueous) + Hydrogen (gas)"? 88.104.61.131 20:20, 1 May 2007 (UTC)

I agree. The magnesium hydroxide formed would be in the solid, not aqueous, phase. Will fix it. Warut 14:58, 10 November 2007 (UTC)

Human health and general biology sections

I just altered the layout of this section a bit. It still needs a lot of work and may need spliting into it own article as it is getting a bit off the central thread of an article on magnesium per seReveldrummond 07:14, 18 July 2007 (UTC)

The Human health info has gone to the magnesium in biology page

The magnesium in biology and magnesium in biological systems and the magnesium transporters pages all need quite a lot of work to fit them into the appropriate portal project. I will have a go at this over the next little while. Is there anyone who can write a section on the animal physiology of magnesium? Reveldrummond 21:58, 20 July 2007 (UTC)

Commonality in Earth vs Universe

I'm not a chemist, but how would we know that magnesium is the nth most common element in the UNIVERSE? Changed this to Earth. If someone with more knowledge would like to reply and correct that, please feel free - as I said, I'm not an expert. Aaeamdar (talk) —Preceding comment was added at 01:56, 21 December 2007 (UTC)

That info was probably taken from here. Since it is unsourced, I doubt that too. Warut (talk) 11:07, 21 December 2007 (UTC)

Elemental abundances in the universe are determined spectroscopically by looking at where most of the elemental (non-dark) mass is, which is in stars, where it lights up well. Granted, for VERY far distances you can only say something about abundances in the early universe, but most of these don't change that much until you get right near the beginning, before much nucleosynthesis. But stellar nuclosynthesis came surprisingly early, so that's a long way. In any case, the most common Mg isotope is made from 6 "alphas" (or more properly, helium nuclei), so it's pretty common. Likewise, C, O, Ne, Si, etc. SBHarris 18:19, 21 December 2007 (UTC)

Ummm....

How in the heck did anyone ever figure out that White-Hot Magnesium is toxic even though the lower temperature form isn't? How do you test something like that? I'm suspicious that this is joke content subtly inserted... —Preceding unsigned comment added by 82.46.180.56 (talk) 03:01, 4 October 2007 (UTC)

I agree. Magnesium oxide fume produced may be toxic but that is not the toxicity of magnesium itself. I'll remove that paragraph. Warut 15:18, 10 November 2007 (UTC)

Im doing an science homework on Metals, Gases and bases, and we had 2 weeks to complete this fact file. But Im still looking for more info on like... Normal phase, Nonmeatl etc, Family and facts on Magnesium. If I dont I ll get a detention. —Preceding unsigned comment added by 219.89.231.96 (talk) 06:34, 24 October 2007 (UTC)

So what's up with the number on the graphic being "14" when the atomic number is 12? —Preceding unsigned comment added by 152.18.36.12 (talk) 15:47, 16 January 2008 (UTC)

Contents reordering

I think the reordering of the contents made by 4.237.53.25 on 10 November 2007 was not vandalism, and, in fact, was very reasonable since it made the order of the contents more in line with other chemical elements. Warut 13:04, 10 November 2007 (UTC)

You may have a valid point and 4.237.53.25 may well have been acting in good faith, in which case I apologise unreservedly for my revert, but the moves messed up the formatting of the page, leaving large gaps. If you think the change was justified, by all means re-do it, but try to keep the formatting tidy. Best wishes, Plantsurfer 13:20, 10 November 2007 (UTC)

OK, I'll reorder the contents the way 4.237.53.25 did and move the magnesium products picture to the left so as to solve the unsightly gap problem. Hopefully, this will make the article look better. Warut 14:42, 10 November 2007 (UTC)

WikiProject Food and drink Tagging

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length

could someone add a tag to simpilify this page? it has somewhat too much detail for an encyclopedia —Preceding unsigned comment added by 76.19.155.125 (talk) 06:27, 9 August 2008 (UTC)

Would you like elaborate? You might find simple:Magnesium more beneficial. Wizard191 (talk) 19:37, 9 August 2008 (UTC)

extraction from seawater

I find the statement that magnesium is separated as a carbonate from seawater by adding calcium carbonate suspicious. The solubility of calcium carbonate is smaller than that of magnesium carbonate so this reaction probably does not take place. Instead calcium hydroxide is used and the less soluble magnesium hydroxide is precipitated.Dinogep (talk) 18:14, 3 November 2008 (UTC)

Farmer story source?

Can anyone provide a valid source for the story of the farmer and his Espom Salts? Thanks. —Preceding unsigned comment added by 71.127.210.103 (talk) 22:42, 15 January 2009 (UTC)

What about this sentence?

Under 5 Biological role this sentence sounds a bit funny to me:

"Refining of food can reduce magnesium substantially, however, and use of synthetic fertilizers which do not contain the necessary amount of magnesium may produce which contain less magnesium than produce fertilized organically."

The first part is true: there's magnesium in bran. The second needs a cite and I don't believe it. SBHarris 23:17, 29 January 2009 (UTC)

"use of synthetic fertilizers ...may produce which contain less magnesium than produce fertilized organically." The bold part seems to be grammatically incorrect. Noun Verb Noun. If produce is used as the verb, the noun is missing, "use of synthetic fertilizers ... may produce what"? If produce is used as a noun, the verb is missing, "use of synthetic fertilizers may do what to produce"? IsmAvatar (talk) 19:18, 3 February 2009 (UTC)

On further inspection, the grammar error appeared when you refined upon poor phrasing of a previous statement, adding "produce produce", which a later editor regarded as redundant and removed one of the "produce", even though the first was being used as a verb and the second as a noun. As to the original statement: "Refining of food can reduce magnesium substantially, however, and fertilizers use less magnesium. This has led to observations of reduced dietary magnesium intake as compared to earlier generations." was paraphrased from the cited paper "There are observations that the Mg intake of humans has declined very sharply during the past few decades (68). This may be due to the refining and preparing of food but also to the use of fertilizers with no Mg (53)"

53: Marier JR, Neri LC, Anderson TW. Water hardness, human health and the importance of magnesium. National Research Council of Canada. Report 17581, 1979.

68: Seeling MS. Magnesium deficiency with phosphate and vitamin D excesses--role in pediatric cardiovascular disease? Cardiovasc Med 1978;3n(6):637-50.

The ref was added in originally here: http://en.wikipedia.org/w/index.php?title=Magnesium&diff=prev&oldid=254182698

IsmAvatar (talk) 20:04, 3 February 2009 (UTC)

Semi-protect requested

Vandalism by IP users is getting out of hand on this article and so I've requested semi-protection. --Marc Kupper|talk 07:33, 7 March 2009 (UTC)

It's only averaged about 2 a day and as far as I can see enough folk are reverting. I'll continue to monitor, and feel free to ask again if it gets any worse. --John (talk) 07:58, 7 March 2009 (UTC)

Only two a day is too many! Science editors have better things to do than revert articles which IP schoolkids vandalize daily. Chemical element articles are a good example of articles which should generally be semi-protected. Take a look at hydrogen, helium, and oxygen for examples of nice, clear, evolving sprotected articles. Contrast with the neverending stupidities added every day to carbon, magnesium, and aluminium. As is the usual pattern for non-sprotected US presidents, about half the total edits to the article are IP vandalisms which must be removed. That's also true of the last HISTORY page of THIS article, and I see not a single IP valid contribution there. The whole thing is a waste of time, and a waste of wikipedia resources. In fact, I'm going to repost this section on the Wikiproject element as an RfC. Personally, I'm really tired of it. SBHarris 23:55, 7 March 2009 (UTC)

John, while I agree that the average of two different IP vandals per day is low but this article happens to the most vandalized, by far, of the 202 I'm watching at the moment. In the three years I've been editing on WP this is the second article that I felt merited WP:RPP. The last 50 page edits are 100% vandalism and reverting. I agree with you that a templated warning often stops the IP vandals in their tracks. Presumably the 19 separate vandals involved in those 50 edits now lead saintly lives as a result of getting burned while attempting to set the Magnesium article on fire.

BTW, there seems to be a pattern in that this article is only vandalized on weekdays. The implication is that it's by students bored with their chemistry class.

However, I have also seen that when an off the beaten path article such as this one gets semi-protected for a month that the vandals seem to forget about it and do not return once the article is unprotected. That was my intent in asking for semi-protection. --Marc Kupper|talk 02:05, 8 March 2009 (UTC)

Very well, I've semi-protected for one month. I hope that is to your liking. To put it in perspective, there are articles on my watchlist which attract much more vandalism than this, but I am also aware that as an admin I am entrusted with these tools to make life easier for folks like you. --John (talk) 03:26, 8 March 2009 (UTC)

Thank you John. We'll probably hear from those we deprived of their favorite hobby, reverting vandalism. --Marc Kupper|talk 04:36, 8 March 2009 (UTC)

Yes, thanks. I'm sure the other vandal-reverting Twinklers can find other stuff that needs their attention. SBHarris 04:37, 8 March 2009 (UTC)

Chart suggestion for vitamins and minerals.

Chart suggestion for vitamins and minerals.

Having been in business with a herbal department, there appears to be a need for a standardized presentation of vitamins and minerals to provide handy information to the general public.

Suggestion the following graph, if someone with this ability can present it as so.

Recommend a stardaized chart. Top lines, recommended daily allowance.

Then prioritized items that provide the element, together with amount of item in each serving and a percentage of the recommended daily allowance.

Why?

Well say vitamin C. One glass of orange juice. 100%

Vitamin D. One egg, 20. 3%

At the bottom of the chart important co ingredients required, and or negative factors to absorption. —Preceding unsigned comment added by Caesarjbsquitti (talk • contribs) 09:41, 18 March 2009

Do you mean a chart like what's at Dietary minerals? --Marc Kupper|talk 18:01, 18 March 2009 (UTC)

Atomic radius?

I think the atomic radius might be wrong, if one uses the pure Mg crystal's basal plane spacing to obtain this value, assuming a hard sphere criterion. XRD shows that the spacing in a Mg crystal is 2* .1624 nm or equivalently, a radius of 162 pm, obviously dependant upon temperature. 1 2. Does anyone know where the current 150 value comes from 129.78.64.100 (talk) 03:32, 23 June 2009 (UTC)

Usually those kind of radii are approximations, taken as an average over many Mg compounds. Another wild guess is that you have to take the distance (maybe again averaged) between the nearest-neighbor Mg atoms in an hcp lattice, not basal plane distance. Sorry, no time to look up right now. Materialscientist (talk) 03:47, 23 June 2009 (UTC)

The basal planes are the close packed planes, you cannot have a closer packing in HCP, as I understand. The value quoted should be referenced in some way, so that a useful definition can be found by an interested reader. If this is not possible, I would suggest using the pure material. What do other element pages do?129.78.64.100 (talk) 04:48, 23 June 2009 (UTC)

The answer is simple: all elementboxes used old (yearlier than 1960s) and incorrect data data from the Atomic radii of the elements (data page) ("experimental" and "calculated" atomic radii). They have been updated recently. Materialscientist (talk) 11:06, 27 June 2009 (UTC)

Accuracy of inciendary values

I disagree about the flame temperature reached by magnesium, citing the following reference compared to the recently added DOE citation. I am more inclined to believe a quantitative study in a materials science journal, than a DOE handbook.

• Edward L. Dreizin, Charles H. Berman and Edward P. Vicenzi. "Condensed-phase modifications in magnesium particle combustion in air". Scripta Materialia. 122. doi:10.1016/S0010-2180(00)00101-2.

Furthermore the following citation disagrees on the autoignition temperature of pure magnesium, placing it at 630C.

• N. V. Ravi Kumar, J. J. Blandin M. Suérya and E. Grosjean. "Effect of alloying elements on the ignition resistance of magnesium alloys". doi:10.1016/S1359-6462(03)00263-X. {{cite journal}}: Cite journal requires |journal= (help)

Any thoughts? User A1 (talk) 11:47, 30 October 2009 (UTC)

As no-one has replied, I have replaced the DOE citation. User A1 (talk) 06:22, 12 December 2009 (UTC)

Universe (I know it's a minor point...)

If no one objects, I'd like to change "universe" in the article heading to "known universe" because human knowledge of the universe is so slight. Efcmagnew (talk) 04:15, 5 February 2010 (UTC)

Removal of redlinks in this article

This seems counterproductive. I am new to WP and don't know if there is a relevant policy on redlinks, but it is my opinion that they are useful. Without them there would be no most wanted articles list. Is there a policy? Efcmagnew (talk) 05:13, 15 February 2010 (UTC)

The policy is WP:REDLINKS. In short, they are allowed, but to a reasonable extent. The mentioned removal was not a good habit, but the removing editor already realized that. There is no use now to go around and restore them - better focus on the article text. Materialscientist (talk) 05:30, 15 February 2010 (UTC)

Spelling Mistake

There is a huge, easily corrected spelling mistake on the page (Ccharacteristics). —Preceding unsigned comment added by 211.44.213.181 (talk) 08:29, 16 February 2010 (UTC)

Thanks. Fixed. Materialscientist (talk) 08:31, 16 February 2010 (UTC)

I really think that this article should be unlocked. In that case the anon could have contributed directly, without having to register, get autoconfirmed or whatever. I see no reason for a permanent lock here. If you look at the watch count, it is at 130 -- plenty of watchers. User A1 (talk) 12:06, 16 February 2010 (UTC)

Unprotected. Elements don't get that much vandalism these weeks. Materialscientist (talk) 12:34, 16 February 2010 (UTC)

Great, thanks! User A1 (talk) 15:08, 16 February 2010 (UTC)

Any 12 year old knows that wikipedia is as reliable as Herodotus

But seriously "and has been implicated in the development of a number of human illnesses such as asthma, osteoporosis, and ADHD.[15]"... Besides being at it's core one of the stupidest things I've ever read.... They even go to the trouble of citing a source.... which if checked says nothing even CLOSE to this! The most relevant part of the article cited is the mention of magnesium being used to help "treat" asthma.. Go wikipedia go! —Preceding unsigned comment added by 75.70.91.35 (talk) 01:34, 13 March 2010 (UTC)

Thank you, I have corrected that statement to comply with the source. As to critique, there is such phenomenon as vandalism, thus if you see something wrong, please don't jump to conclusions. Materialscientist (talk) 05:22, 13 March 2010 (UTC)

Steel a metal?

The article says "Magnesium is the third most commonly used structural metal, following steel and aluminium" - isn't that a bit incorrect? AFAIK the steel is an alloy, not a metal, shouldn't it be replaced with "iron"? —Preceding unsigned comment added by 78.54.66.10 (talk) 15:10, 1 June 2010 (UTC)

Are you being confused with the lede paragraph in Metal? It starts off by claiming that a metal is an "element", as you imply, and follows this by allowing that a metal is an "an element, compound, or alloy". If you accept the second sentence as correct, then there is no problem on this page. --Old Moonraker (talk) 15:29, 1 June 2010 (UTC)

A very valid comment. Changed steel to iron to avoid confusion. Materialscientist (talk) 22:29, 1 June 2010 (UTC)

Magnetic Property of Magnesium

I may have found a mistake under the "Miscellanea" section. I was under the impression that because Magnesium has a valence shell consisting solely of a complete 3s2 subshell with no unpaired spins that it would be diamagnetic, versus the listed paramagnetic. Please note, I am not an expert and only came across the possible error while doing homework. If it is a special case or if I have overlooked something I apologize and I hope I haven't wasted anyone's time. —Preceding unsigned comment added by Smwilliams222 (talk • contribs) 10:58, 14 November 2010 (UTC)

There is no mistake. Whereas beryllium (one row up in periodic table) is indeed diamagnetic, Mg, Ca and below are paramagnetic. In heavier group-2 elements the reason is simple - s electrons jump to the d-shell, but this doesn't work for Mg and I need to look up why (it is paramagnetic). Materialscientist (talk) 11:33, 14 November 2010 (UTC)

My guess is that because for Be and Mg we're still in a place with (almost) no shell-overlap, so it's a big jump to any d. In Mg it's from 3s to 3d, which is a jump of 3 orbital energies. However, a jump from 4s up to the same 3d is no problem, as they are right next door (another way of saying this, is that the periodic table d-block begins right after calcium, but there's no d-block for some distance, after magnesium). SBHarris 18:09, 14 November 2010 (UTC)

Magnesium metal and its alloys are explosive hazards, this is simply wrong.

Magnesium, aluminum, titanium, most types of grain are all considered fire hazards when in powdered form. "The magnesium-bodied Honda RA302 of Jo Schlesser crashes and burns during the 1968 French Grand Prix. Schlesser was killed." This follows the heading "Magnesium metal and its alloys are explosive hazards", giving the impression bulk forms present danger. This is one of hundreds of formula racing related deaths, and can not be attributed to the magnesium used for the construction of body. The fuel, tires, the plastics used in wiring, any padding, the restraint system all would have contributed to the fire before magnesium. With an ignition temperature above 1200°F it is well above 495°F ignition temperature of the 58 laps of gasoline left in his tank. Tires have ignition temperature of 900°F, both gasoline and tires have low thermal mass and in bulk are not self extinguishing. Magnesium is still widely used in F1 and we see Carbon fiber epoxy composites being used, these are vastly more dangerous than bulk magnesium. This needs to be updated and corrected. — Preceding unsigned comment added by Joshdeetz (talk • contribs) 03:33, 17 December 2010 (UTC)

Well, I agree it's wrong to blame the fire on magnesium, but it's also wrong to say the magnesium didn't burn. It burned. If you watch http://www.youtube.com/watch?v=4yI8XFFP3Yg you can see them trying to put it out with water (bad idea which they'd never do with a mag fire today), and like a typical magnesium fire it just burns even more, and like a flare (there's also a lot of black smoke gasoline and rubber, but this is different). I'll see what I can do with the article to avoid creating the wrong impression. Magnesium is used in lots of cars, sure, and when water is used on those fires, they sometimes get even worse. http://www.krem.com/home/Structure-fire-in-Brownes-Addition-105304403.html So what do we say about this? Mag fires are very bad! SBHarris 01:30, 4 January 2011 (UTC)

Edit request from 59.101.37.110, 3 January 2011

{{edit semi-protected}} Within the precautions section, it is stated that elemental Magnesium fires can be extinguished with sand. This is partially in error, as the introduction of SMALL AMOUNTS of sand to hot solid magnesium still allows combustion, using the chemical equation:

2 Mg (s) + SiO2 (s) → 2 MgO (s) + Si (s).

Only with large amounts of sand can magnesium fires be extinguished, as heat is drawn away and absorbed by the crystalline matrix before the sand has an opportunity to decompose.

Please rectify this mistake. 59.101.37.110 (talk) 06:12, 3 January 2011 (UTC)

I don't see a mistake - the text mentions that the fire is to be covered with sand to isolate it from atmosphere, which certainly means a large amount. Materialscientist (talk) 06:37, 3 January 2011 (UTC)

Autoignition temperature

The current autoignition temperature value of 630 °C (903 K; 1,166 °F) in air was discussed and changed 12 December 2009. Unfortunately, I can not verify the value because that reference is behind a paywall. According to inchem.org (a very good reference), the correct value is 473 °C (746 K; 883 °F).

There also appear to be a problem with the burn temperature. The text says 3,100 °C (3,370 K; 5,610 °F) (behind another paywall), but other sources say around 2,200 °C (2,470 K; 3,990 °F), though the values varies considerably. Q Science (talk) 17:49, 21 December 2011 (UTC)

From one of the original references for this article

The ignition temperature of massive magnesium is very close to its melting point of 650 degrees C (1,202 degrees F). (See Table 2.) However, ignition of magnesium in certain forms may occur at temperatures well below 650 degrees C (1,200 degrees F). For example, magnesium ribbons and shavings can be ignited under certain conditions at about 510 degrees C (950 degrees F), and finely divided magnesium powder can ignite below 482 degrees C (900 degrees F).

Q Science (talk) 19:02, 21 December 2011 (UTC)

I can't access ref. 2 but can email you ref. 1. They measured the ignition temperature on bulk 2x2x2 cm samples and their results agreed with past work (Fassel WM, Gulbransen LB, Lewis JR, Hamilton JH. J Met 1951;3:522.). No doubt, fine powder will show lower critical temperatures (not only for ignition, but also for melting, etc.). This quote from ref. 1 might also explain lower values reported in other work In pure Mg .. the oxide film produced up to approximately 450 °C seems to be protective [3], [7] and [8].. For a temperature of about 500 °C, the oxide is no longer protective and fracture of the oxide occurs, leading to contact between fresh metal and air. Under such conditions, the oxidation rate may sharply increase. At 575 °C, a change in the rate of oxidation was reported from less than 0.5 mg cm−2 h−1 to approximately 10 mg cm−2 h−1[8]. This sudden increase of the oxidation rate constitutes probably the origin of the apparent self-heating of the sample. Materialscientist (talk) 23:35, 21 December 2011 (UTC)

This is obviously a complicated area and similar issues probably occur with all flammable materials. In the references I've seen, the temperature of 473 °C is for dust. I have not seen any reference for ribbon. It makes sense that large masses require more heat for the reason presented in the reference. I would appreciate you adding some of this to the article since I don't think that I have adequate references. Q Science (talk) 03:14, 22 December 2011 (UTC)

I came here wondering why magnesium gains weight when burnt.

Sadly, there's nothing on it. Or whether epsom salts can be ignited either. Both are questions I came here for answers to. :( — Preceding unsigned comment added by 114.76.160.25 (talk) 11:38, 29 December 2011 (UTC)

"gains weight" is not an unambiguous phrase so I am not sure what you are really looking for. That said, burning causes oxygen to bind with the metal. Perhaps that is what you are looking for. Q Science (talk) 23:58, 3 January 2012 (UTC)

DAB

"Corvette" here links to Corvette (the ship), but it should link to Chevrolet Corvette. I can't edit the article, though. Perhaps somebody else would? 79.77.226.51 (talk) 22:24, 10 February 2012 (UTC)

Thank you for pointing that out, hopefully it should now be fixed.  ⊃°HotCrocodile...... + 22:42, 10 February 2012 (UTC)

Organic uses of magnesium

Should this article be split of better sectioned between the supplement (health and organic) side and the metalurgical side of magnesium? It seems to waffle back and forth and may be less confusing with more distinct sections or articles with cross references. The maganese article has the similar appearance. 99.251.114.120 (talk) 03:55, 12 March 2012 (UTC)

We try to split as much as we can, and segues are harder in ledes than anywhere else, since you have less help from headers, and so on, there. I'll read over it, but be WP:BOLD and make your own segue-edits and move info around, where you are sensitive to this type of thing.SBHarris 20:09, 12 March 2012 (UTC)

Pencil sharpener

(1973)One of the highest volume applications for wrought magnesium is this pencil sharpener, which has been in production for over 25 years.. p. 14 http://books.google.de/books?ei=L_ReT5ymPMrMsgaNg8G8CQ. {{cite book}}: Missing or empty |title= (help) The explanation why magnesium and not aluminium is given in. p. 11 http://books.google.de/books?id=9NnDQ0oJFLEC&pg=PA11. {{cite book}}: Missing or empty |title= (help) This might be a good addition!

--Stone (talk) 07:29, 13 March 2012 (UTC)

I don't see "volume" as especially significant here. By count possibly, but by weight or volume (space), pencil sharpeners are still fairly rare compared to Volkswagens. It might have been illustrative as an example of "Where to find magnesium in the home", except that it's not a given that any extruded light alloy pencil sharpener will be magnesium, rather than aluminium - I've just looked at my extensive (UK) stationery cupboard: more or less half-and-half between extruded aluminium and diecast mazak, none of them being magnesium. Of course these days most are plastic anyway. Andy Dingley (talk) 09:21, 16 April 2012 (UTC)

The inventors company Möbius und Ruppert in Erlangen still exists an I emailed them and all metal pencil sharpeners they produce are either brass or magnesium. The state that the machinability is superior to that of aluminium. They sell a lot of them and before cheaper production elsewhere they held a quite good share of the world market.--Stone (talk) 11:52, 16 April 2012 (UTC)

Clofibrate redirect

Magnesium Clofibrate redirects here but the article makes no mention of it. I actually don't know what it is. I accidentally hit the wrong search completion.BenPlotke (talk) 06:26, 11 May 2012 (UTC)

The redirect should have been to clofibrate. I've fixed it. SBHarris 02:55, 30 May 2012 (UTC)

Unreferenced, poorly contrived conjecture.

The last sentence in the following quote should be removed from the article: ".... Flame temperatures of magnesium and magnesium alloys can reach 3,100 °C (3,370 K; 5,610 °F),[7] although flame height above the burning metal is usually less than 300 mm (12 in).[8] Magnesium may be used as an ignition source for thermite, a mixture of aluminium and iron oxide powder that is otherwise difficult to ignite. Those properties are due to magnesium's high specific heat, the fourth-highest specific heat among the metals...." . The preceding properties are not only not due to high specific heat, but would actually be in spite of a high specific heat. A high specific heat leads to a lower change in temperature for a given increase in energy/heat. . If that were not enough, the claim that magnesium has the 'fourth highest specific heat among metals' isn't specific enough to be meaningful. Volumetric specific heat? Molar specific heat? Mass specific heat capacity? Are we talking Isobaric or Isochoric? . Finally, even searching through each of the myriad of specific heat distinctions, it appears that more than four metals can be found in each with greater values than magnesium. . . Please remove that rubbish. . 70.171.47.39 (talk) 18:34, 18 June 2014 (UTC)BGriffin

I removed the sentence that you highlight. If there are additional modifications that you think would improve the article, please feel free to edit the article. ChemNerd (talk) 18:53, 18 June 2014 (UTC)

History of Magnesium word

in the history page it says that Magnesium word has came from a district/region in Greece named Magnesia.. the Magnesia word can be true but its originally came from Magnesia ad Spilyum (today Manisa in Turkey). you can ask whats the difference between two sides but there is . the Magnesium/Magnetism word came from the Turkey Magnesia because of magnetism of Mount Spil (Spiylum).. the mountain has some magnetism over the city of Manisa.. thats the true history of it..

for more about info of magnetism please have a check this useful site: http://physics.info/magnetism Abbass34 (talk) 14:53, 9 October 2014 (UTC)

Most online sources are consistent with the article as it currently stands, but since neither the source that I've added to the article nor the one you have linked above is a scholarly source, I think it is worth trying to find a better source to resolve the issue. -- Ed (Edgar181) 14:54, 9 October 2014 (UTC)

we have to check that is there any magnetism in that region in Greece or not.. i will try to find more info about magnetism in Mount Spil. greetz Abbass34 (talk) 15:13, 9 October 2014 (UTC)

The name derives originally, indirectly, from the Magnetes tribe and has nothing to do with magnetism. Magnetism's name is derived from Magnetite, another mineral that derives from the Magnesia region and that gives natural lodestones and thus magnetism.

These names were long established before there was a Turkey or even an Ottoman Empire. Andy Dingley (talk) 15:29, 9 October 2014 (UTC)

• See: K. J. Thurlow (1 January 1998). Chemical Nomenclature. Springer Science & Business Media. p. 46. ISBN 978-0-7514-0475-3. Alexbrn ^{talk|contribs|COI} 15:27, 9 October 2014 (UTC)

Andy!!! you are talking like a racist again! i didnt mean any politic but you are talking! please shut the fuck up and stop talking about Turkey, Ottoman Empire and Ataturk!

i didnt say/mean that Turks found Magnetism or something like that!

i know old/ancient people who lives in ancient Magnesia ad Spiylum that lidian! we are not talking about ethnical! be careful to talk about SUBJECT! Abbass34 (talk) 15:43, 9 October 2014 (UTC)

and for Alexbrn: this is a useful source/reference/book.. but the owner of book has forgotten the real story! when Thales (not from Turkey/Ottoman Empire ofcourse!!) was walking on the Mount Spilyum. and he discovered a stone from this mountain then he called it Magnesia stone. because there was Magnesia People there! and if you check about mountain's magnetism then u can see the biggest magnet over the world! Abbass34 (talk) 15:54, 9 October 2014 (UTC)

http://galileoandeinstein.physics.virginia.edu/more_stuff/E&M_Hist.html Abbass34 (talk) 15:57, 9 October 2014 (UTC)

The Magnesia ad Sipylum article notes that there has been debate on whether magnetite was named for this now Turkish site or the Ionian region, both of which are Magnites tribe outposts. The debate is inconclusive. The best we can do here is note that. [1].SBHarris 17:17, 9 October 2014 (UTC)

But WP is not reliable. Is there any real debate in RS's? Alexbrn ^{talk|contribs|COI} 17:30, 9 October 2014 (UTC)

The contentious change was to bring in "a city in Turkey called Magnesia" This is both swapping "region" for "city" (which is never going to be decided one way or the other) but it also brings in an anachronistic country name of Turkey (and yes, it's a Turkish ISP) rather than the names current at the long-ago times when magnetite and magnesia alba were named. Andy Dingley (talk) 18:00, 9 October 2014 (UTC)

The historical contention has been because the oldest source, Pliny, actually does not mention Mt. Spil (Sipylum) but rather Mt. Ida, presumably the Turkish one: Mount Ida (Turkey). In the Elder Pliny's tale (which he sources to Nicander), magnes stone is named for a shepherd actually named Magnes, who had his iron shoe nails and iron-capped shepherd's rod attracted by the ground of Mr. Ida. [2] There is no Thales (of who we know almost nothing anyway, except he thought the universe was made of water and magnets had a soul). Now you put that story of Magnes the magnetic shepherd, which sounds like a just-so story made up after the fact, if ever there was one, up against the known Magnities tribes and the known loadstones that actually DO come from Magnesia (named for the tribes) in (at least) Turkish Anatolia, and you choose. I'm putting my money on the places (Greece if you can find loadstone in Ionia, Turkey if it comes only from Anatolia), and tribe, not some shepherd named Magnes. LOL.

If you want to add fanciful folklore from Pliny the Elder to the article etymology, be my guest, but not here on magnesium. If that goes anywhere, it's on magnetite or magnet. Keep it off the articles on magnesium and manganese, which are surely named from the region in Greece, even if magnets and magnetism might not be. Does anybody know if loadstone is found in Greece? Apparently it is found in Anatolia, Turkey, but is widely distributed. SBHarris 23:02, 9 October 2014 (UTC)

Reorganisation of biological roles section

I plan to organize the above section into at least 12 subsections, and move all the existing text to its appropriate subsection. I will not be adding or deleting either text or references, just rearranging. If there is an objection to this approach, let's discuss it here, rather than getting into deleting and reverting. IiKkEe (talk) 14:29, 8 January 2015 (UTC)

Isn't "at least 12" a bit much, given the overall TOC? Current grouping, at first glance, looks like a good level of detail. (I can not discuss it by content). -DePiep (talk)

Thanks for your interest. My basic premise is that with each new paragraph in a section that has a new subject, it deserves to be a subsection and have that subject named in a subsection title. I hope you will reserve judgment until you see the revised section Biological Effects in its entirety. I suspect we are not debating right vs wrong in this situation, but preferences. I am a splitter, others are lumpers.

If you would like to take a look at an example of this approach, take a look at the Caffeine page TOC - on 9 Nov vs now. The Effects section had 2 subsections, now 7; the Sources section had no subsections, now 4; The Mechanisms of action section had no subsections, now 7. Little new material was added - paragraphs were simply labelled with a subsection heading naming their content. Over the 2 months of editing this page, several other editors not only monitored my edits, but also voiced no objection, and on more than one occasion contributed to expanding and naming new subsections.

I will post here when the section revision is complete so you can review it.

Regards, IiKkEe (talk) 00:31, 9 January 2015 (UTC)

I can not judge based on page content, this is not my topic. I noted that this one section with ~12 subsections does not produce a balanced TOC. If its on;ly lumping vs splitting, then lumpers have a point. -DePiep (talk) 01:03, 9 January 2015 (UTC)

If you do an embedded list (see WP:EMBED) with or without numbers, sometimes you can just set off paragraphs with a bolded heading, which keeps you from going down yet another level in subsection outline. The choice is aesthetic only. I'm a big fan of having nested stuff this way, but then I think the future will have more paragraphs and mini-sections with bolded topics like this. See for example: Glass#Silicate glass.

You know, writing technical presentation is not a finished and done thing. Even the MoS wasn't handed down from God. We just happen in 2015 to be in a transition era where long sections of 20 paragraphs are permitted without any sub-division, which is often warranted, sometimes for each paragraph, and other times for every several. In the last century, page-long paragraphs were permitted! Now, we have them down to 5 to 10 sentences. But we're not yet at the optimal way to present material, IMHO. The more divisions we have to signal topic change (other than paragraphs and section headers), the better I like it. But they don't all need to be set off with headers that have their own line and nothing else but spaces. SBHarris 03:08, 9 January 2015 (UTC)

To-DePiep User:Sbharris I have completed my rewrite of the Lead and the Biological roles sections. Ended up with nine subsections, not twelve. If you would care to review these and comment here, I would welcome that. For now, however, my 77 edits have been reverted for uncertain reasons, so you will find my most recent revision on the "View history" page at 07:24 10 January 2015. Do you think this version deserves to be restored? Regards, IiKkEe (talk) 09:35, 10 January 2015 (UTC)

Edit by Mikey99999

User:Mikey99999 - I was mistaken. The info you added to the Lead which I deleted was already in the article, in the Biology section, under Distribution; only it is for a 70 kg adult, not a 50 pounder, and is in grams, not pounds. I hope that is sufficient for you. Regards. IiKkEe (talk) 00:50, 11 January 2015 (UTC)

Recent edits

IiKkEe has been heavily editing the article and inroducing poor non-WP:MEDRS sourcing, duplicate text and a load of broken markup that damages the page. I have reverted to a functional version. IiKkEe - please be much more careful. Alexbrn ^{talk|contribs|COI} 07:23, 10 January 2015 (UTC)

First, please read the above discussion on reorganizing the Biological effects section with subsections and tell us what you think. Second, instead of wholesale reversion, which you did to my edits once before, and now again with reversion of 77 edits, each explained, point out to me a specific example of "poor non-WP:MEDRS sourcing" and I will either delete the sentence that needs sourcing or provide it. Third, if there is duplicate text, point it out and I will delete it. Fourth, point out the load of broken markup that damages the page and I will correct it. That should leave the remaining edits intact unless you have additional specific objections. I welcome specifics.

I look forward to a response here. IiKkEe (talk) 08:02, 10 January 2015 (UTC)

• See here for duplicate text (1st and final para).
• Then look at the reference list (e.g. items 53 & 54) for broken markup
• PMID 14596323 (e.g.) is not WP:MEDRS

If you cause this kind of page damage again, I shall seek administrative assistance. Alexbrn ^{talk|contribs|COI} 08:14, 10 January 2015 (UTC)

Alex, 'call Security' is not a good argument. -DePiep (talk) 08:38, 10 January 2015 (UTC)

I see I inadvertently duplicated a sentence, and you have corrected it. Thank you for that.

I don't know what a broken markup is, so I can't spot it. If it is something I inadvertently did, and you know how to correct it, would you?

I also don't know what the "PMID.. is not..." means. If this is another inadvertent error on my part, is it correctable?

And now back to the central issue: do you have a specific objection to any of my 77 edits? If so, let's discuss them here. If not, please do not revert my edits a third time. Their aim is to improve the page. Thank you. IiKkEe (talk) 09:19, 10 January 2015 (UTC)

In the link I gave, can you not see that references 53 and 54 (in the "References" section) contain raw markup (by which I mean the underlying wikitext with "=" "{" "<" etc characters in it)? Alexbrn ^{talk|contribs|COI} 09:48, 10 January 2015 (UTC)

Bad reference showing? Simple, IiKkEe. After saving, check the reference footnotes. It should not show text like "|title=". To make a good ref citation, go to documentation of {{cite}} (or anything CS1). -DePiep (talk) 10:50, 10 January 2015 (UTC)

I fixed some refs. liKkEe please review correct "ref name = jones" format. Also review WP:MEDRS -- Alexbrn is right that some of these poorly supported med things have got to go. Meanwhile the logic and organization is improved and i don't want to lose your work over a ref format screwup. SBHarris 15:03, 10 January 2015 (UTC)

Absolutely, if the structure/logic/content can be improved without leaving a faulty page facing the reader then go for it IiKkEe, but there is no deadline ... Alexbrn ^{talk|contribs|COI}

To User:Sbharris Thank you for your help. Just to be super clear, I have not and I am not defending the content of the Magnesium page. I did not author any of the content other than to copyedit the Lead. I simply rearranged the existing content under new subsections - the good and the bad - that has been there for days, weeks, and years. If it is time for others to make deletions of longstanding material, I am all for it: any criticism of poorly referenced or poorly written content should be directed at the authors of that content. Lastly, thank you for simply fixing my inadvertent structural errors rather than trying to teach me how. I screw up occasionally with my Copy and Paste. Regards, IiKkEe (talk) 01:46, 11 January 2015 (UTC)

Semi-protected edit request on 17 June 2016

The first paragraph under "Physical Properties" ends with "alkali earth metals", this should be "alkaline earth metals".

Zair~enwiki (talk) 14:52, 17 June 2016 (UTC)

Done. Thank you! Double sharp (talk) 15:11, 17 June 2016 (UTC)

Bulk modulus edit request

Hey there,

the bulk modulus for Mg is rougly 35 GPa and NOT 45 GPa.

Source: Charles P. Poole Jr (2004): Encyclopedic Dictionary of Condensed Matter Physics, Vol A, Page 749. (https://books.google.de/books?id=CXwrqM2hU0EC&pg=PA749#v=onepage&q&f=false) — Preceding unsigned comment added by 2A02:908:F325:F580:3DC5:577E:1408:CDB6 (talk) 08:46, 24 June 2016 (UTC)

Spamspamspam

That whole paragraph under "threonate" is written in an inappropriately promotional tone. Per WP:MEDRS, the whole bit should be removed until the findings can be replicated. 2600:8807:C104:BE00:4882:4295:B2F0:7FEF (talk) 23:17, 31 July 2016 (UTC)

Done I removed all non-neutral statements but kept the references. Mooseandbruce1 (talk) 05:41, 1 August 2016 (UTC)

bioavailability in food

In the area of nutrition supplements, Magnesium oxide is infamous for being very cheap and common but having extremely low bioavailability, and thus nearly useless for human nutrient purposes. Most other Magn supplement chemical forms are supposed to be much more bioavailable, at about 30%. What form is Magnesium in, in common foods, and what is the bioavailability in various foods -- is there significant variation in this?-71.174.180.38 (talk) 18:51, 6 September 2016 (UTC)

small intestines primary site for Magnesium absorption

This source: www.ancient-minerals.com/magnesium-sources/absorption/
says that in the human body most magnesium absorption occurs in the small intestines. It seems to include some respectable sources. If this is a true fact it would be worth mentioning in the article.-71.174.180.38 (talk) 19:23, 6 September 2016 (UTC)

links to Magnesium deficiency articles

Please add appropriate article links to:

• Magnesium deficiency (medicine)
• Magnesium deficiency (plants)

I would do it, but the article seems to be locked. (I don't know how to find out since when or why.)
(Also, this talk page is getting aggressively auto-archived, but the archives seem to be hidden, with no obvious links. And some crufty old junk debris sections seem to be getting left behind by the bots.) -71.174.180.38 (talk) 21:43, 6 September 2016 (UTC)

Benzodiapezine action

Where is the appropriate place to notate Magnesium's action as a positive allosteric modulator on GABAA receptors? Several studies have noticed an anxiolytic effect, which has been explored in mice via flumazenil and diazepam to show that the same receptors are involved. Combining clinical doses of magnesium with agonists such as diazepam can cause a synergistic effect. —John Moser (talk) 20:17, 5 February 2017 (UTC)

Discoverer

This page says that magnesium was discovered by Humphrey Davy, but the page on Joseph Black says that he discovered it. Which is correct? VenomousConcept (talk) 18:16, 2 June 2017 (UTC)

Joseph Black discovered it, when working with magnesium carbonate (i.e. the metal in salt form). Specifically he recognised that it was different from calcium (and calcium carbonate). Both metals, and their salts, are pretty common and easy to obtain, but Black was the first to distinguish them.

Davy was the first to isolate magnesium as a metal. Amongst a number of reactive metals, Davy was the first to find methods to reduce them to their metallic form. Andy Dingley (talk) 19:28, 2 June 2017 (UTC)

old note

Article changed over to new Wikipedia:WikiProject Elements format by maveric149. Elementbox converted 10:08, 23 Jun 2005 by Femto (previous revision was that of 08:01, 11 Jun 2005).

Add late sign for archiving purposes. Original post was made before November 2014. -DePiep (talk) 13:45, 27 November 2017 (UTC)

Production

Anyone know how to isolate Mg?

Electrolysis- obtain a soluble Mg compound, dissolve in water, place 2 leads into water conected to power supply, Mg will form at negative electrode

Add late sign for archiving purposes. Original post was made before November 2014. -DePiep (talk) 13:45, 27 November 2017 (UTC)

Information Sources

Some of the text in this entry was rewritten from Los Alamos National Laboratory - Magnesium. Additional text was taken directly from USGS Magnesium Statistics and Information, USGS Periodic Table - Magnesium, from the Elements database 20001107 (via dict.org), Webster's Revised Unabridged Dictionary (1913) (via dict.org) and WordNet (r) 1.7 (via dict.org). Data for the table were obtained from the sources listed on the subject page and Wikipedia:WikiProject Elements but were reformatted and converted into SI units.

Add late sign for archiving purposes. Original post was made before November 2014. -DePiep (talk) 13:45, 27 November 2017 (UTC)

Compounds

I am interested in what compounds Magnesium might form with Silicon and Yttrium. If anyone has lab equipment suitable for experiments of this nature, would you mind trying these and posting your findings here?

Other things you might try:

• Mg + Co
• Mg + Cr
• And the Radioactive Elements

According to the ASM Hand Book

Mg-Si crystallographic data Phase Composition, wt% Si Pearson symbol Space group (Mg) 0 hP2 P63/mmc Mg2Si 36.61 cF12 Fmm (Si) 100 cF8 Fdm High-pressure phases Mg2Si(a) 36.61 . . . . . . SiII 100 . . . . . .

(a) Above 2.5 GPa and 900 °C, it forms a hexagonal structure.

Mg-Si (Magnesium - Silicon) A.A. Nayeb-Hashemi and J.B. Clark, 1988

A.A. Nayeb-Hashemi and J.B. Clark, 1988, Phase Diagramsof Binary Magnesium Alloys, ASM International, MetalsPark, OH, USA

• The powder used in athletics is not the metal

Althetic chalk is made of magnesium carbonate. Please fix the article is it states that the metal form of magnesium is used. --mav

The article says that "Once ignited, it is difficult to extinguish, being able to burn in both nitrogen (forming magnesium nitride), and carbon dioxide."

The titanium article on this website says that only titanium can burn in nitrogen. Can magnesium not burn in a pure nitrogen atmosphere, but can still burn nitrogen when its in the air? If so, then this should be made more clear.

Google found a number of "elements" pages that repeat the claim that only titanium burns in nitrogen. But there is a US Dept of Energy handbook on spontaneous heating and pyrophoricity that claims "Magnesium may also burn in an atmosphere of nitrogen to form magnesium nitride." [3] The same page mentions titanium as also having this property. Both metals burn in a CO₂ atmosphere as well. Anyway, I tend to believe this reference. It looks like the titanium article needs updating if the DoE handbook is correct. If people have lingering doubts, maybe someone with access to CRC or some other source could find a corroborating authoritative reference.

The autoignition temperature for magnesium is nowhere close to 4000 F. It is a mere 1205 F, which corresponds to 652 C or 925 K.

Also, magnesium is the 6th most abundant metal according to Dr. Doron Aurbach of the Bar-Ilan University in Israel. Dr. Doron Aurbach is currently working on rechargeable magnesium batteries and has previously discovered several improvements to the Lithium-Ion battery used in most cell phones and other mobile devices this very moment.

I have also done my research on magnesium since I wrote an entire essay (4000 words), and its ability to combust in an atmosphere of carbon dioxide, or even within solid carbon dioxide, more commonly known as dry ice. This essay was checked for accuracy by two experts at the University of Helsinki. To the point, my sources also indicate that magnesium can burn in an atmosphere of nitrogen, as can titanium.

Add late sign for archiving purposes. Original post was made before November 2014. -DePiep (talk) 13:45, 27 November 2017 (UTC)

Refs for history

• Bergman, Torbern; Beddoes, Thomas (1784). Physical and chemical essays.
• Black, Joseph (1777). Experiments upon magnesia alba, quick-lime, and other alcaline substances.
• Partington, Charles Frederick (1836). The British cyclopædia of literature, history, geography, law, and politics.
• Henry Pownall (Of Epsom, Eng.) (1825). Some particulars relating to the history of Epsom: Compiled from the best authorities; containing a ... Description of the origin of horse racing, and of Epsom races, with an account of the mineral waters, and the two celebrated palaces of Durdans and Nonsuch, &c., &c. To which is added, an appendix, containing a botanical survey of the neighbourhood.
• Multhauf, R. P. (1976). "Geology, Chemistry, and the Production of Common Salt". Technology and Culture. 17 (4): 634–645. doi:10.2307/3103671. JSTOR 3103671.
• . doi:10.1098/rstl.1722.0071. {{cite book}}: Missing or empty |title= (help)
• Brown, J. (1722). "Observations and Experiments on the Sal Catharticum Amarum, Commonly Called the Epsom Salt. By Mr. John Brown, Chymist, F. R. S". Philosophical Transactions. 32 (370–380): 348–354. doi:10.1098/rstl.1722.0069. JSTOR 103635.

Add late sign for archiving purposes. Original post was made before November 2014. -DePiep (talk) 13:45, 27 November 2017 (UTC)

Atomic radius size?

Other places (atomic radius page, ptable, webelements)say the empirical radius of Magnesium is 150 pm, the article says 160.

Add late sign for archiving purposes. Original post was made before November 2014. -DePiep (talk) 13:45, 27 November 2017 (UTC)

Semi-protected edit request on 14 August 2017

A decade-long study that reviewed cardiovascular disease research extending over more than 70 years found low magnesium levels contributed more to heart disease than did cholesterol or even saturated fat.

Andrea Rosanoff, PhD, director of research and science information outreach for the Center for Magnesium Education & Research, LLC, in Pahoa, Hawaii, and a medical advisory board member for the nonprofit Nutritional Magnesium Association, led the review that continues the work started by Mildred Seelig, MD. She first began studying magnesium’s possible connection to heart disease more than 40 years ago.

Rosanoff’s most telling finding? “That common risk factors for cardiovascular disease such as high LDL cholesterol, low HDL cholesterol, high blood pressure, and metabolic syndrome are all associated with low nutritional magnesium status or low magnesium dietary intakes,” she says. “Also that there are many peer-reviewed studies that show correcting or preventing a nutritional magnesium deficit can and will correct or prevent cardiovascular disease events, including death.” Koopakid1 (talk) 14:05, 14 August 2017 (UTC)

Not done: Instructions for an edit request are "change X to Y" with a source provided. In this case, no such request was made and no WP:MEDRS source provided. No action on this request. --Zefr (talk) 15:12, 14 August 2017 (UTC)

Semi-protected edit request on 23 November 2017

The bulk modulus value for magnesium is wrong: change "Bulk Modulus 45 GPa" to "Bulk Modulus 35.4 GPa" Source: K. A. Gschneider, Solid State Phys. 16, 308 (1964) Andreabaldi (talk) 17:07, 23 November 2017 (UTC)

@Andreabaldi:  Done I'm making this change even though I can't access the source because I doubt you would come along and just make this up. Do you know if your source is accessible anywhere on the internet? CityOfSilver 17:37, 23 November 2017 (UTC)

Also, this was a bit strange since technically, that information box is on a different article. The change, which might take a little while to show on the magnesium article, can be seen here. CityOfSilver 17:41, 23 November 2017 (UTC)

Ehum, CityOfSilver, you find it strange that you can edit a Template? Really? Please. -DePiep (talk) 21:57, 23 November 2017 (UTC)

@DePiep: What's nice about being me is the more snide and insulting people get towards me, the likelier it is that they're wrong. See, for example, how badly you misread my reply, where I never said anything about it being "strange that [I] can edit a Template" [sic]. That rhetoric was an attempt to gently explain to a new user that their request was in the wrong place, not that it was a major issue, and it was a reaction to a thing I've personally noticed where recent changes to a template take some time to show up on other pages where it's embedded. I think we've interacted before but I don't recall. Was it bad? CityOfSilver 04:51, 28 November 2017 (UTC)

So you are meeting more likewise responses? Could it be then that your rhetoric is a systematic source? -DePiep (talk) 08:35, 28 November 2017 (UTC)

•  Undone. Unsourced. -DePiep (talk) 22:02, 23 November 2017 (UTC)

Unfortunately, I haven't been able to find an open source version of the article , for which a subscription to Science Direct is required. Indeed, I am not making this up ;-). If it can be of any reassurance, I have written multiple scientific articles on the elastic properties of Mg (see ).Andreabaldi (talk) 12:07, 24 November 2017 (UTC)

I have access to the article and can confirm it does contain the information Andreabaldi gives. Nonetheless, I am concerned in that the article is from 1964. The value of 45 comes from Elastic properties of the elements (data page), cited to WebElements, which gives some sources for its information, mostly from the 1990s: see Elastic properties of the elements (data page)#WEL for the listing. Are these mistaken? Do you have a more recent study confirming Gschneider's 1964 table, that would clear away all my doubts? Double sharp (talk) 14:23, 24 November 2017 (UTC)

Yes, those values are mistaken and it is easy to demonstrate: the bulk modulus (K) can be calculated from the Young modulus (E) and the Poisson ratio (nu) as K=E/[3*(1-2*nu)] (see the conversion formulas in https://en.wikipedia.org/wiki/Elastic_modulus). For a Young modulus of 45 GPa and a Poisson ratio of 0.29, the correct bulk modulus is therefore given by K=45/[3*(1-2*0.29)]=36 GPa. Given the formula above, a material can have identical values of K and E (as it is erroneously given now for magnesium) only if nu=0.333 (see for example selenium and bismuth in the Elastic properties of the elements (data page)).Andreabaldi (talk) 12:12, 27 November 2017 (UTC)

OK, thanks for the explanation. I've made your requested change: thank you once again for drawing attention to this error! Double sharp (talk) 13:08, 27 November 2017 (UTC)

References

Typo at Uses as a metal

The Germans coined the name "Elektron" for magnesium alloy, a term is still used today.

Semi-protection so I cant edit, pls fix. /Ouzhoulang (talk) 22:40, 2 December 2017 (UTC)

Not done: it's not clear what changes you want to be made. Please mention the specific changes in a "change X to Y" format. @Ouzhoulang: What needs to be fixed? RudolfRed (talk) 23:18, 2 December 2017 (UTC)

from: The Germans coined the name "Elektron" for magnesium alloy, a term is still used today. to: The Germans coined the name "Elektron" for magnesium alloy, a term which is still used today. reason: Otherwise it wouldn't make any sense. /Ouzhoulang (talk) 23:22, 2 December 2017 (UTC)

Done Already done by requester. Sakura Cartelet^Talk 01:48, 3 December 2017 (UTC)

Semi-protected edit request on 10 January 2018

The citation needed for use of Magnesium Foundry Flux to extinguish Mg and Al fires (Safety Precautions section of page) can be found in the book "Operation of Fire Protection Systems" by Arthur E. Cote and published by Jones & Bartlett Learning, 2003 under the auspices of the National Fire Protection Association of the US. page 667 in chapter 37. 50.247.247.81 (talk) 15:15, 10 January 2018 (UTC)

 Done Thank you! Double sharp (talk) 15:27, 10 January 2018 (UTC)

Magnesium (medical use)

Add this section Magnesium (medical use) 109.206.156.72 (talk) 22:12, 17 January 2018 (UTC)

Semi-protected edit request on 6 February 2018

164.153.233.158 (talk) 15:29, 6 February 2018 (UTC)

Not done: Your request is blank or it only consists of a vague request for permission to edit the article. It is not possible for individual users to be granted permission to edit a semi-protected article; however, you can do one of the following:

• If you have an account, you will be able to edit this article four days after account registration if you make at least 10 constructive edits to other articles.
• If you do not have an account, you can create one by clicking the Login/Create account link at the top right corner of the page and following the instructions there. Once your account is created and you meet four day/ten edit requirements you will be able to edit this article.
• You can request unprotection of this article by asking the administrator who protected it. Instructions on how to do this are at WP:UNPROTECT. An article will only be unprotected if you provide a valid rationale that addresses the original reason for protection.
• You can provide a specific request to edit the article in "change X to Y" format on this talk page and an editor who is not blocked from editing the article will determine if the requested edit is appropriate. —KuyaBriBri^Talk 15:35, 6 February 2018 (UTC)

Where's molar mass?

Please add the molar mass. 2600:1700:4CA1:3C80:495C:70F4:E9F6:4A08 (talk) 00:55, 15 April 2018 (UTC)

Just take the standard atomic weight and multiply it by 1 g/mol. Double sharp (talk) 04:01, 15 April 2018 (UTC)

Nutritional deficiency statement contradicted by its reference, requesting edit, 5 August 2018

In the nutritional deficiency section, there is the statement that "The primary cause of deficiency is low dietary intake: less than 10% of people in the United States meet the recommended dietary allowance." But reference #56 directly contradicts this: "Hypomagnesaemia due exclusively to reduced dietary intake is very uncommon.". Also, this reference does not provide any statistics on the dietary intake of US population. I question the validity of the cited statement in the article. If there are supporting sources they should be included. 135.23.193.68 (talk) 14:22, 5 August 2018 (UTC)

I found this reference: https://www.ncbi.nlm.nih.gov/pubmed/22364157 Which states: "Almost half (48%) of the US population consumed less than the required amount of magnesium from food in 2005-2006"

Please remove the original sentence in the article for these three reasons: 1. It presented an inaccurate (exagerated) prevalence of insufficient dietary intake, 2. It was unsourced, and 3. That low dietary intake would be the primary cause of deficiency was contradicted by reference #56.

Please add the information that half of the US population did not meet RDA in 2005-2006, with this accompanying reference: https://www.ncbi.nlm.nih.gov/pubmed/22364157

Thank you 135.23.193.68 (talk) 14:47, 5 August 2018 (UTC)

Done. If you create an account, make 10 edits, and gain 4 days of experience, you won't have to make an edit request the next time you want to change a semi-protected article. Thanks for contributing to Wikipedia! — Newslinger talk 15:56, 7 August 2018 (UTC)

References

{{1. Lock, J.Y., et al., Degradation and antibacterial properties of magnesium alloys in artificial urine for potential resorbable ureteral stent applications. Journal of biomedical materials research Part A, 2014. 102(3): p. 781-792. 2. Witte, F., The history of biodegradable magnesium implants: a review. Acta biomaterialia, 2010. 6(5): p. 1680-1692. 3. Witte, F., et al., In vivo corrosion of four magnesium alloys and the associated bone response. Biomaterials, 2005. 26(17): p. 3557-3563. 4. M. Navarro, A. Michiardi, O. Castaño, J.A. Planell, Biomaterials in orthopaedics, J. R. Soc. Interface. 5 (2008) 1137–1158. doi:10.1098/rsif.2008.0151. 5. Staiger, M.P., et al., Magnesium and its alloys as orthopedic biomaterials: a review. Biomaterials, 2006. 27(9): p. 1728-1734. 6. Farraro, Kathryn F et al. Revolutionizing orthopaedic biomaterials: The potential of biodegradable and bioresorbable magnesium-based materials for functional tissue engineerin” 2013 Journal of biomechanics vol. 47,9: 1979-86.}}

Nick Tondravi (talk) 18:49, 28 November 2018 (UTC)Nick Tondravi Nick Tondravi (talk) 18:49, 28 November 2018 (UTC)

Semi-protected edit request on 28 November 2018

I wanted to add a section about magnesium as a biomaterial under the uses section

 Not done: please establish a consensus for this alteration before using the {{edit semi-protected}} template. Given the amount of content you would like added, consensus is a must. DannyS712 (talk) 18:53, 28 November 2018 (UTC)

Biomaterial

Magnesium makes a good biomaterial because its degradation products are non-toxic, has desirable mechanical properties, and is fully biodegradable and bioresorbable . In 1878, the first use of magnesium as a biomaterial was reported as a material in ligatures to stop bleeding in the radial artery and varicocele . But, the biomedical uses of magnesium and its alloys were never researched intensely due to the rapid corrosion of magnesium that made it difficult to work with as opposed to materials like stainless steels and titanium . Now medicine is making a transition from using bioinert materials to investigating materials that interact with the body and improve natural healing . While most researchers look for a metal that can form a passivating layer of oxide that inhibits further corrosion; magnesium’s more negative electrode potential and inability to form a stable passivating layer in the body lead to its degradation .

Currently, magnesium is being looked at for stents and orthopedic applications . In a study from the University of Hannover in Germany, 4 different magnesium alloys were tested in guinea pigs to observe the degradation of the alloys and the associated response from the animals, compared to a standard polymer based implant. Formation of gas bubbles was observed around the implantation sites about a week after implantation and stopped appearing about 2-3 weeks later, gas was released by puncturing the bubbles with no adverse effects observed . Despite the gas bubbles forming from the fast corrosion of the magnesium implants there was significantly more mineralized bone observed in the guinea pigs that had been implanted with magnesium . In this study, it was also observed that magnesium stimulated osteoblasts and helped bone regrow over the implant and stimulated natural healing processes . In another study from the University of Canterbury in New Zealand it was found that biodegradable magnesium implants used for orthopedic applications would lower health care costs and morbidity rates associated with secondary surgeries to remove implants like bone screws and plates .

Magnesium’s high strength and low density make it ideal for uses in the body because it wouldn’t be burdensome to the patient and the levels of magnesium in the body is readily managed by excretion in urine and adsorption through the gut . Additionally, different alloy compositions and surface treatments can impact the degradation rate of the devices that are implanted in patients . In a study done at University of California Riverside, the researchers claim that magnesium forms stable compounds with reactive oxygen species in the body. These species are released by immune cells to degrade foreign substances and can damage healthy tissue if they remain in the body, but magnesium can prevent this tissue damage by forming these compounds . The study from Riverside was also investigating the antibacterial properties of the magnesium alloys and found no statistically significant difference in bacteria concentration on a magnesium stent in an artificial urine solution . One of the major concerns of implantable biomedical devices is bacterial colonization, but with magnesium there was shown to be no real cause for concern .

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Magnesium as a Biomaterial

I would like to suggest that a section for uses of magnesium as a biomaterial be added to the article. Currently magnesium is being studied in the US for applications as a biomaterial especially for orthopedic applications and is currently being used for parts like bone screws in Europe. As stated in my previous edit request the material is promising for this use as it is non toxic as it degrades, stimulates the body to act as it degrades, and has superior host response to other materials that are currently used. I am new to editing wikipedia and was unaware of the protocol for editing protected pages and did not anticipate this difficulty. I hope my work from earlier is acceptable to consider editing and this post can be used to build consensus. — Preceding unsigned comment added by Nick Tondravi (talk • contribs) 18:22, 30 November 2018 (UTC)

"Magnessium" listed at Redirects for discussion

An editor has asked for a discussion to address the redirect Magnessium. Please participate in the redirect discussion if you wish to do so. Steel1943 (talk) 19:34, 20 September 2019 (UTC)

Partial NMDA receptor antagonist activity of magnesium needs to be added to this page

• As a partial NMDA Antagonist to prevent excitotoxicity, neuroplasticity changes, and tolerance development to drugs in the amphetamine class. — Preceding unsigned comment added by 136.63.47.245 (talk) 16:39, 7 October 2019 (UTC)

Research is ongoing on the medical benefits of magnesium for it's effects on the NMDA receptors as magnesium is a partial NMDA antagonist. There is a growing volume of research into the relationship of the N-methyl-D-aspartate (NMDA)receptor system and it's role in neurodegenerative disorders, substance abuse disorders, depression and a variety of physical and mental conditions due to it's.

Can someone add this to the main page in some way? ^ I think there's enough research on this topic to at least include some of it in the main page as ongoing research. — Preceding unsigned comment added by AllboutmagnesiumNMDAstuff (talk • contribs) 20:49, 8 October 2019 (UTC)

Not WP:MEDRS-compliant. Tgeorgescu (talk) 22:05, 8 October 2019 (UTC)

References

Semi-protected edit request on 13 November 2019

i need to see the url of the periodic table at the bottom Aviationtune (talk) 17:57, 13 November 2019 (UTC)

 Not done: it's not clear what changes you want to be made. Please mention the specific changes in a "change X to Y" format and provide a reliable source if appropriate. Could you perhaps be looking for this? —KuyaBriBri^Talk 18:27, 13 November 2019 (UTC)

low-fat vanilla yogurt as source

In the image caption in the nutrition section low-fat vanilla yogurt is listed as a source.

• Why specifically low-fat and not normal-fat?
• Natural or synthetic vanilla flavor?
• Is this a good example of magnesium rich food, if so why?

Semi-protected edit request on 15 June 2020

Melting points should have the temperature in Celcius in brackets. This can be instead of Fahrenheit or as well as. But having it in Farrenheit is inconsistent with other articles on elements. So, change... Magnesium has the lowest melting (923 K (1,202 °F)) and the lowest boiling point 1,363 K (1,994 °F) to Magnesium has the lowest melting (923 K (650 °C)) and the lowest boiling point 1,363 K (1,090 °C) Iagdotme (talk) 14:28, 15 June 2020 (UTC)

 Not done: This is already like this in the infobox; and the format is consistent with other elements, eg. Iron RandomCanadian (talk / contribs) 14:41, 15 June 2020 (UTC)

⚩

⚩ redirects to this article, but the sign does not occur on the whole page. --RokerHRO (talk) 23:19, 15 July 2020 (UTC)

Moreover: https://www.unicode.org/charts/nameslist/n_2600.html says,

 26A9	 ⚩ 	Horizontal Male With Stroke Sign
	 	= alchemical symbol for iron

--RokerHRO (talk) 23:23, 15 July 2020 (UTC)

Changed ⚩. Good catch. -DePiep (talk) 08:57, 16 July 2020 (UTC)

Major impact minor use

CF wiki "cast iron". For about a century Magnesium has been added to cast iron to improve strength and usability. Only 50 parts per million Magnesium needed but usually excess added (Mg boils below steel melting temp). This replaced 1000ppm Cerium from Misch metal and hence shuttered US Rare Earth mining operations. The Mg doesn't alloy with with the Iron but makes the excess dissolved Carbon precipitate as round graphite particles that intercept cracks instead of usual graphite flakes that propagate cracks and lower strength. TaylorLeem (talk) 02:02, 23 October 2020 (UTC)

@TaylorLeem: I suppose this is a semi-protected edit request? I will add the info to the article, but sources are still needed asap. --Luminoxius (talk) 05:55, 23 October 2020 (UTC)

Upon further examination, this content is already present under Use as a metal > Other --Luminoxius (talk) 06:08, 23 October 2020 (UTC)

Reference to Cast_iron wikipedia article. Is wkipedia not a reference? TaylorLeem (talk) 09:03, 23 October 2020 (UTC)

@TaylorLeem: A link to Ductile iron, also known as ductile cast iron, nodular cast iron, spheroidal graphite iron, spheroidal graphite cast iron and SG iron, is already present. --Luminoxius (talk) 06:25, 24 October 2020 (UTC)