High-pressure x-ray and neutron powder diffraction study of PbWO4 and BaWO4 scheelites

被引：30
|
作者：
Grzechnik, A
Crichton, WA
Marshall, WG
Friese, K
机构：
[1] Univ Basque Country, Dept Fis Mat Condensada, E-48080 Bilbao, Spain
[2] European Synchrotron Radiat Facil, F-38043 Grenoble, France
[3] Rutherford Appleton Lab, ISIS Neutron Facil, Didcot OX11 0QX, Oxon, England
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2006年 / 18卷 / 11期
关键词：
D O I：
10.1088/0953-8984/18/11/008
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The room-temperature high-pressure behaviour of PbWO4 and BaWO4 scheelites (I4(1)/a, Z = 4) has been studied with synchrotron angle-dispersive x-ray powder diffraction in a diamond anvil cell and time-of-flight neutron powder diffraction in a large-volume Paris-Edinburgh cell. Full profile Rietveld refinements of the neutron data provide evidence for distinct compressibility mechanisms in these materials. The distortion in the anionic array from the ideal fluorite packing in BaWO4 increases upon compression while it decreases in PbWO4.
引用
收藏
页码：3017 / 3029
页数：13
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