In situ Raman Study of ОН-Perovskite MgSi(OH)6 at High Р–Т Parameters (up to 14 GPa, 420°С)

In situ Raman spectroscopy in a diamond anvil cell (DAC) is used to study ОН-perovskite MgSi(OH) 6 under compression in water and carbonate fluids at high Р–Т parameters (up to 14 GPa, 420°С). The ОН-perovskite ↔ 10 Å phase + х Н 2 О transition is either partially reversible or irreversible when the...

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Bibliographic Details
Published in:Bulletin of the Russian Academy of Sciences. Physics 2020-09, Vol.84 (9), p.1123-1125
Main Authors: Goryainov, S. V., Likhacheva, A. Yu, Shatskiy, A. F., Rashchenko, S. V.
Format: Article
Language:English
Subjects:
Diamond anvil cells
Hadrons
Heavy Ions
Nuclear Physics
Parameters
Perovskites
Phase transitions
Physics
Physics and Astronomy
Raman spectroscopy
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Summary:In situ Raman spectroscopy in a diamond anvil cell (DAC) is used to study ОН-perovskite MgSi(OH) 6 under compression in water and carbonate fluids at high Р–Т parameters (up to 14 GPa, 420°С). The ОН-perovskite ↔ 10 Å phase + х Н 2 О transition is either partially reversible or irreversible when there is a deficit of water in the system. When ОН-perovskite is compressed in carbonate fluid, the reversible transition shifts slightly to higher pressures, testifying to the drop in the activity of water when carbonate is added in the system.
ISSN:1062-8738
1934-9432
DOI:10.3103/S1062873820090154