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Liquidus phase relations in the system MgO–MgSiO3 at pressures up to 25 GPa—constraints on crystallization of a molten Hadean mantle

✍ Scribed by Dean C Presnall; Yi-Hua Weng; Cheney S Milholland; Michael J Walter


Book ID
117196973
Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
233 KB
Volume
107
Category
Article
ISSN
0031-9201

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An __in situ__ X-ray powder diffraction study has shown the cubic modification of (NH~4~)~2~SiF~6~ (cryptohalite, space group __Fm__¯3__m__) at 0.2–0.3 GPa to transform irreversibly into the trigonal bararite, space group __P__¯3__m__1. The anisotropy of lattice strain in the high-pressure phase of