Ice XVI
Ice XVI is the least dense (0.81 g/cm3)[1] experimentally obtained crystalline form of ice. It is topologically equivalent to the empty structure of sII clathrate hydrates. It has been first obtained in 2014 by removing gas molecules from a neon clathrate under vacuum at temperatures below 147 K.[1] The resulting empty water frame, ice XVI, is thermodynamically unstable at the experimental conditions, yet it can be preserved at cryogenic temperatures. Above 145–147 K at positive pressures ice XVI transforms into the stacking-faulty Ice Ic and further into ordinary Ice Ih . Theoretical studies predict Ice XVI to be thermodynamically stable at negative pressures (that is under tension).[2][3]
See also
- Ice for other crystalline form of ice
References
<templatestyles src="Reflist/styles.css" />
Cite error: Invalid <references> tag; parameter "group" is allowed only.
<references />, or <references group="..." />| Crystalline types | |||||
|---|---|---|---|---|---|
| Formations and phenomena |
|
||||
| Ice-related activities |
|
||||
| Constructions | |||||
| Work | |||||
| Other uses | |||||
| Ice ages | |||||
<templatestyles src="Asbox/styles.css"></templatestyles>
 |
This material-related article is a stub. You can help Wikipedia by expanding it. |
<templatestyles src="Asbox/styles.css"></templatestyles>
 |
This physical chemistry-related article is a stub. You can help Wikipedia by expanding it. |
<templatestyles src="Asbox/styles.css"></templatestyles>
 |
This inorganic compound–related article is a stub. You can help Wikipedia by expanding it. |
