NEW HIGH-PRESSURE TRANSFORMATION IN ALPHA-QUARTZ

被引：170

作者：

KINGMA, KJ

HEMLEY, RJ

MAO, HK

VEBLEN, DR

机构：

[1] JOHNS HOPKINS UNIV,DEPT EARTH & SPACE SCI,BALTIMORE,MD 21218

[2] CARNEGIE INST WASHINGTON,CTR HIGH PRESSURE RES,WASHINGTON,DC 20015

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.70.3927

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Recent experimental and theoretical studies report that quenched pressure-amorphized alpha-quartz is elastically anisotropic and displays a reversal of anisotropy with respect to the original crystallographic orientation. We demonstrate that samples recovered from static compression experiments of alpha-quartz exhibit an unusual pressure-induced microstructure, which arises from a new phase transformation in alpha-quartz at 21 GPa. Upon decompression, the high-pressure phase reverts to a quartzlike structure in a twinned state, accounting for the previously reported elastic behavior.

引用

页码：3927 / 3930

页数：4

共 32 条

[1] ELASTIC INSTABILITY IN ALPHA-QUARTZ UNDER PRESSURE [J].