Superionic and metallic states of water and the Anomaly of Water

  • #1
1
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Summary:

It is possible that you freeze water and the volume of the water cube go down?

Main Question or Discussion Point

https://www.wired.com/story/a-bizarre-form-of-water-may-exist-all-over-the-universe/
Black ice


I knew the Black Ice Theories since around 1990
https://www.nature.com/articles/s41586-019-1114-6
-- Demontis, P., LeSar, R. & Klein, M. L. New high-pressure phases of ice. Phys. Rev. Lett. 60, 2284–2287 (1988). --

and since 1990 i have been asking myself:

if you have deepsea-water / water under great preasure
and you "Freeze" the water
the volumina of the water-cube go down.

there are theories that you "Freeze" the 4°C deepsea! water
(has absolutely nothing to do with freezing of a lake / surface)



possible or not?



As example from wiki:
"type VII ice which is 60 percent denser than normal water " … volume bigger/smaller?
 

Answers and Replies

  • #2
cmb
788
13
Cubic ice, 1c, is theorised, not sure if it is an experimental fact, might form in terrestrial conditions, but I think is only in small volumes and is metastable.

https://en.wikipedia.org/wiki/File:Phase_diagram_of_water.svg

At terrestrial lab conditions there is Ice IX ; https://en.wikipedia.org/wiki/Ice_IX

At higher pressures, all sorts of things are theoretically possible. I read that Jupiter's magnetic field has been speculated to be partly or significantly due to metallic water.

According to some texts, ice XI is possibly the more common phase of water in the universe; https://en.wikipedia.org/wiki/Ice_XI, in an orthrhombic form, but at much higher (TPa) pressures may form hexagonal metallic forms.

This is just what I have read, I have no background on this. Not read about your link before. Interesting.
 

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