:Talk:Solid oxygen

There is something puzzling me about the facts presented in this article: it describes several high pressure phases that solid oxygen displays and then relates this to room temperature. However room temperature is over 100 C above the critical temperature of O2. Can solid O4 really exist at 20 C?--AssegaiAli (talk) 13:21, 23 August 2008 (UTC)

:High pressure can solidify everything. —Preceding unsigned comment added by 81.236.230.234 (talk) 05:48, 15 December 2008 (UTC)

::cough except for water cough --Nickotte (talk) 19:34, 29 August 2012 (UTC)

:::It will solidify that too, see Ice#Phases, Graeme Bartlett (talk) 22:00, 29 August 2012 (UTC) Image:Phase diagram of water.svg

:::: Maybe not helium (does solid helium exist at all?); but high pressure can solidify most substances. — Tonymec (talk) 06:39, 1 February 2021 (UTC)

::::: P.S. Even helium can be solidified but not at atmospheric pressure regardless of temperature. According to the page Helium a pressure of 2.5 MPa (25 bar) is required at about 1 to 1.5 K, or about 114,000 atm at room temperature. Tonymec (talk) 06:51, 1 February 2021 (UTC)

The article currently talks about γ-phase of oxygen being Pm{{overline|3}}m (No. 221), citing a paper from the MDPI journal oxygen. But the paper has a typo, the space group is Pm{{overline|3}}n (No. 223), as comparison with the [https://web.archive.org/web/20111229065324/http://cst-www.nrl.navy.mil/lattice/struk/a15.html A15 structure] should make clear. See also [https://doi.org/10.1103/PhysRevB.23.4714] and [https://doi.org/10.1107/S0365110X6400202X]. 〈 Forbes₇₂ | Talk 〉 02:21, 23 November 2023 (UTC)