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Elsevier, Chemical Physics Letters, 3-4(333), p. 264-270

DOI: 10.1016/s0009-2614(00)01147-7

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Pressure-induced transformations of cristobalite

Journal article published in 2001 by Ls S. Dubrovinsky, Na A. Dubrovinskaia, Sk K. Saxena, F. Tutti, S. Rekhi, T. Le Bihan, Guoyin Shen ORCID, J. Hu
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This paper is available in a repository.

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Abstract

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 unidenti®ed phases obtained on the compression of a-cristobalite, new dense silica polymorph in the Martian Shergotty meteorite, and controversial post-stishovite phase is a-PbO 2 -like silica. Ó 2001 Elsevier Science B.V. All rights reserved.