Scheelite CaWO4 at high pressures

被引：50

作者：

Grzechnik, A ^{[1
]}

Crichton, WA

Hanfland, M

van Smaalen, S

机构：

[1] Univ Bayreuth, Crystallog Lab, D-95440 Bayreuth, Germany

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

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2003年 / 15卷 / 43期

关键词：

D O I：

10.1088/0953-8984/15/43/010

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The high-pressure room-temperature behaviour of scheelite CaWO4 (141 la, Z = 4) is studied using high-resolution synchrotron angle-dispersive x-ray powder diffraction in diamond anvil cells loaded with helium or a mixture of methanol and ethanol as the pressure-transmitting media. At about 10 GPa, there occurs a phase transition to the fergusonite type (12/a, Z = 4) without any discontinuity in the pressure dependence of the unit cell volumes. These observations are discussed in relation to the high-pressure-high-temperature systematics of the AMX(4) and AX(2) type compounds.

引用

页码：7261 / 7270

页数：10

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