High-pressure and high-temperature polymorphism in silica

被引：6
|
作者：
Dubrovinsky, LS
Dubrovinskaia, NA
Prakapenka, V
Seifert, F
Langenhorst, F
Dmitriev, V
Weber, HP
Le Bihan, T
机构：
[1] Univ Bayreuth, Bayer Geoinst, D-95440 Bayreuth, Germany
[2] Univ Chicago, APS, CARS, Argonne, IL 60439 USA
[3] European Synchrotron Radiat Facil, SNBL, F-38043 Grenoble, France
来源：
HIGH PRESSURE RESEARCH | 2003年 / 23卷 / 1-2期
关键词：
structure; silica; high pressure; X-ray diffraction;
D O I：
10.1080/0895795031000109706
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We synthesised a number of new silica modifications in the electrically heated diamond anvil cells at pressures over 100 GPa and temperatures over 1200 K. The structure of these polymorphs is based on hexagonal close packing of oxygen atoms with different degree of ordering of silicon atoms in octahedral and tetrahedral sites.
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页码：35 / 39
页数：5
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