Wikipedia:Featured picture candidates/Color SEM 4 (2)

Multicoloured volcanic sublimates on altered rock, Mutnovsky volcano, Kamchatka

Voting period is over. Please don't add any new votes. Voting period ends on 11 Apr 2022 at 12:56:26 (UTC)

Original – Fumarole minerals in SEM images, from Mutnovsky volcano in Kamchatka. An electron micrograph, colour enhanced by optical microscopy, depicted width: 700 microns.

Reason

A few months ago I nominated this image, got one neutral-leaning-oppose (I think) comment and it closed as "not promoted" but perhaps second time is the charm. So, this article has already one featured picture but I think it can have more than one. This image does illustrate three other particular properties of fumarolic minerals that are discussed in sources but are currently not very well illustrated - their multicoloured appearance, the crust-like and how they are deposited on the surfaces of rock cavities. These aspects are discussed in the article but the current lead image does not cover them as well as this one does. Neither image captures all aspects of fumarole minerals perfectly - the current lead image shows the delicate structures better -, but together they cover most aspects of fumarolic minerals. I've expanded the article a little so that it discusses their appearance a bit more.

Articles in which this image appears

Fumarole mineral

FP category for this image

Wikipedia:Featured pictures/Sciences/Materials science

Creator

Зеленский Михаил Евгеньевич

• Support as nominator – Jo-Jo Eumerus (talk) 12:56, 1 April 2022 (UTC)
• Support – this and the current FP, in infobox, make a good set nomination. Bammesk (talk) 14:18, 2 April 2022 (UTC)
• Support – Kavyansh.Singh (talk) 04:50, 3 April 2022 (UTC)
• Support Adam Cuerden ^(talk)_{Has about 7.7% of all FPs} 19:03, 6 April 2022 (UTC)
• Support. MER-C 09:48, 10 April 2022 (UTC)
• question. Are we sure the colours are natural colour? Google images suggests that Thallium iodide is generally yellow.©Geni (talk) 07:02, 11 April 2022 (UTC)

  German and English Wikipedia say that there is a red high-temperature form which is stable for some time after cooling. This source that discusses thallium iodide from fumaroles also says that they did encounter the unstable cubic conformation in fumarole deposits and that the transition to the "normal" orthorombic form is slow. Jo-Jo Eumerus (talk) 08:35, 11 April 2022 (UTC)

• Support.--Vulp❯❯❯here! 09:58, 11 April 2022 (UTC)

Promoted File:Color SEM 4.jpg --Armbrust ^{The Homunculus} 04:49, 12 April 2022 (UTC)