Pressure-induced transformations of cristobalite

X-ray in situ studies in electrically and laser-heated diamond anvil cells (DACs) at pressures over 80 GPa and temperatures above 2500 K were used to determine stable silica phase at extreme conditions. We demonstrate that so far unidentified phases obtained on the compression of α-cristobalite, new...

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Published in:Chemical physics letters 2001, Vol.333 (3), p.264-270
Main Authors: Dubrovinsky, L.S, Dubrovinskaia, N.A, Saxena, S.K, Tutti, F, Rekhi, S, Le Bihan, T, Shen, Guoyin, Hu, J
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creator Dubrovinsky, L.S
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description X-ray in situ studies in electrically and laser-heated diamond anvil cells (DACs) at pressures over 80 GPa and temperatures above 2500 K were used to determine stable silica phase at extreme conditions. We demonstrate that so far unidentified phases obtained on the compression of α-cristobalite, new dense silica polymorph in the Martian Shergotty meteorite, and controversial post-stishovite phase is α-PbO 2-like silica.
doi_str_mv 10.1016/S0009-2614(00)01147-7
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title Pressure-induced transformations of cristobalite
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