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Mineralogical ClassificationICE - VII published
12th Mar 2018 18:55 UTCDavid Von Bargen Manager
Water-rich regions in Earth’s deeper mantle are suspected to play a key role in the global water budget and the mobility of heat-generating elements. We show that ice-VII occurs as inclusions in natural diamond and serves as an indicator for such water-rich regions. 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. In particular, ice-VII in diamonds points toward fluid-rich locations in the upper transition zone and around the 660-kilometer boundary.
12th Mar 2018 21:35 UTCRonnie Van Dommelen 🌟 Manager
13th Mar 2018 04:38 UTCDon Windeler
Cheers,
D.
13th Mar 2018 08:15 UTCDavid Von Bargen Manager
Ice IX: An Antiferroelectric Phase Related to Ice III
https://aip.scitation.org/doi/abs/10.1063/1.1669438
13th Mar 2018 12:20 UTCJolyon Ralph Founder
I wonder what the mohs hardness would be?
13th Mar 2018 12:53 UTCMarco E. Ciriotti Manager
13th Mar 2018 17:12 UTCRonnie Van Dommelen 🌟 Manager
This paper mentions hardness and ice-VII, but they don't say what it is. Instead they get into a discussion of bulk modulus of diamond-lattice substances.
www.roaldhoffmann.com/sites/all/files/386.pdf
There is also this book that talks about ice hardness, but the relevant pages are not shown:
https://books.google.ca/books?isbn=019958771X
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