Crystal structure of the high-pressure monoclinic phase-II of cristobalite, SiO2

被引：42

作者：

Dove, MT

Craig, MS

Keen, DA

Marshall, WG

Redfern, SAT

Trachenko, KO

Tucker, MG

机构：

[1] Univ Cambridge, Dept Earth Sci, Cambridge CB2 3EQ, England

[2] Rutherford Appleton Lab, ISIS Facil, CLRC, Didcot OX11 0QX, Oxon, England

来源：

MINERALOGICAL MAGAZINE | 2000年 / 64卷 / 03期

关键词：

cristobalite; high-pressure; neutron diffraction; phase transitions;

D O I：

10.1180/002646100549436

中图分类号：

P57 [矿物学];

学科分类号：

070901 ;

摘要：

The crystal structure of the high-pressure phase-II of cristobalite has been solved by neutron diffraction (space group P2(1)/c, a = 8.3780(11) Angstrom, b = 4.6018(6) Angstrom, c = 9.0568(13) Angstrom, beta = 124.949(7)degrees, at P = 3.5 GPa). This phase corresponds to a distortion of the high-temperature cubic beta-phase, rather than of the ambient temperature and pressure tetragonal alpha-phase.

引用

页码：569 / 576

页数：8

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