Pressure-induced transformations of cristobalite

被引：83

作者：

Dubrovinsky, LS

Dubrovinskaia, NA

Saxena, SK

Tutti, F

Rekhi, S

Le Bihan, T

Shen, GY

Hu, J

机构：

[1] Uppsala Univ, Inst Earth Sci, S-75236 Uppsala, Sweden

[2] European Synchrotron Radiat Facil, F-38043 Grenoble, France

[3] Univ Chicago, Chicago, IL 60637 USA

[4] Carnegie Inst Washington, Geophys Lab, Washington, DC 20015 USA

来源：

CHEMICAL PHYSICS LETTERS | 2001年 / 333卷 / 3-4期

关键词：

D O I：

10.1016/S0009-2614(00)01147-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

X-ray in situ studies in electrically and laser-heated diamond anvil cells (DACs) at pressures over 80 cpa 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 cc-cristobalite, new dense silica polymorph in the Martian Shergotty meteorite, and controversial post-stishovite phase is alpha -PbO2-like silica. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：264 / 270

页数：7

共 22 条

[1]

Anderson O. L., 1995, EQUATIONS STATE SOLI, P405

[2] Pressure-induced Landau-type transition in stishovite [J].