Template:Did you know nominations/Solid nitrogen

The following is an archived discussion of the DYK nomination of the article below. Please do not modify this page. Subsequent comments should be made on the appropriate discussion page (such as this nomination's talk page, the article's talk page or Wikipedia talk:Did you know), unless there is consensus to re-open the discussion at this page. No further edits should be made to this page.

The result was: promoted by PFHLai (talk) 07:08, 12 May 2016 (UTC)

Solid nitrogen

(

)

... that solid nitrogen is an important component of the surfaces of Triton, a moon of Neptune, and of the dwarf planet Pluto?

ALT1:... that non-molecular forms of solid nitrogen have a higher energy density than any other non-nuclear material?
ALT2:... that under pressure, solid nitrogen and helium can form a birefringent van der Waals compound with formula He(N₂)₁₁?
Reviewed: Template:Did you know nominations/Grace Banker
Comment: Moved to mainspace on 30 April 2016
ALT1 is not presently referenced but hopefully can be as it is a fact from the article lead which surprised me as a chemist.
ALT2 is an unusual compound, its discovery was reported I Nature.

Moved to mainspace by Graeme Bartlett (talk). Nominated by EdChem (talk) at 11:53, 1 May 2016 (UTC).

Actually ALT1 is referenced as it is stated lower down in the crystal structure section for cg-N and referenced by "Structural transformation of molecular nitrogen to a single-bonded atomic state at high pressures". I put it in the lead because it is exciting. Graeme Bartlett (talk) 12:38, 1 May 2016 (UTC)

Thanks, I have added a cross-ref into the lede too. EdChem (talk) 12:42, 1 May 2016 (UTC)

However the hook ALT1 is not strictly matching what the article says, as there are other non-molecular forms of solid nitrogen predicted to exist of unspecified energy density. I think that ALT2 is a bit too obscure for the average reader, with several unfamiliar words in it. So how about varying ALT1 to ALT3: Graeme Bartlett (talk) 12:49, 1 May 2016 (UTC)

ALT3:... that one non-molecular form of solid nitrogen has a higher energy density than any other non-nuclear material?

I have struck ALT1, deferring to the article's author on the accuracy of the alternative. I agree that ALT2 could be too obscure although I find it interesting. :) EdChem (talk) 12:54, 1 May 2016 (UTC) In light of recent additions, another option would be as follows. EdChem (talk) 13:48, 1 May 2016 (UTC)

ALT4:... that solid nitrogen is used with liquid nitrogen to achieve more rapid cooling for sperm cryopreservation?

This article is new enough and long enough. Approving ALT0 and ALT4, each of which has an inline citation. The article is neutral and I doubt it has copyright problems. Cwmhiraeth (talk) 06:35, 11 May 2016 (UTC)