Phases of ice - Wikipedia
Ice VII is the only disordered phase of ice that can be ordered by simple cooling. (While ice I h theoretically transforms into proton-ordered ice XI on geologic timescales, in practice it is necessary to add small amounts of KOH catalyst.) It forms …
What the heck is 'ice VII,' and why are scientists using lasers to …
2017年7月12日 · The new findings give us insight into all the weird ways that water can freeze, and are particularly exciting because while ice VII doesn’t exist on Earth in nature, planetary geologists do ...
This Bizarre Form of Ice Grows at Over 1,000 mph, And
2018年10月29日 · New research into a very weird type of ice known as Ice VII has revealed how it can form at speeds over 1,000 miles per hour (1,610 kilometres per hour), and how it might be able to spread across yet-to-be-explored alien worlds.
Ice-VII inclusions in diamonds: Evidence for aqueous fluid in
2018年3月9日 · Ice-VII, the residue of aqueous fluid present during growth of diamond, crystallizes upon ascent of the host diamonds but remains at pressures as high as 24 gigapascals; it is now recognized as a mineral by the International Mineralogical Association.
Ice-seven (Ice VII ) - London South Bank University
Ice-seven (ice VII) forms from liquid water above 3 GPa by lowering its temperature to ambient temperatures (see Phase Diagram). Also, water can freeze to ice VII on sub-microsecond timescales under dynamic compression [ 3280 ].
Weird water phase “ice-VII” can grow as fast as 1,000 miles per …
2018年10月24日 · "Our work shows that ice-VII forms in a very unusual way—by popping into existence in tiny clusters of about 100 molecules and then growing extremely fast, at over 1,000 miles per hour," co...
Ice VII: Scientists Discover How Extraordinary Ice Found ... - Newsweek
2018年11月2日 · Researchers have long known that ice VII exists naturally far below our planet's surface, but until this finding, there was no direct evidence for it.
New understanding of the solidification of high-pressure ice …
(Download Image) Compression experiments allow liquid water to be driven to an extremely undercooled state and nucleate a high-pressure polymorph known as ice VII. Theoretical work at LLNL has revealed the detailed of the nucleation and growth kinetics of this solidification process.
Protonic Diffusion in High-Pressure Ice VII | Science - AAAS
2002年2月15日 · We measured the protonic diffusion coefficient for the highest temperature molecular phase of ice VII at 400 kelvin over its entire stable pressure region. The values ranged from 10 −17 to 10 −15 square meters per second at pressures of 10 to 63 gigapascals.
The preparation and structure of salty ice VII under pressure
2009年4月6日 · The data reveal an ‘alloyed’ ice VII structure incorporating Li and Cl ions. Nature Materials - Freezing water containing salts is believed to produce pure ice and a salt hydrate.
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