High-pressure x-ray and neutron powder diffraction study of PbWO4 and BaWO4 scheelites
High-pressure x-ray and neutron powder diffraction study of PbWO4 and BaWO4 scheelites
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DOI：
10.1088/0953-8984/18/11/008
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发表时间：
2006-03
期刊：
影响因子：
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通讯作者：
A. Grzechnik;W. Crichton;W. G. Marshall;K. Friese
中科院分区：
文献类型：
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作者：
A. Grzechnik;W. Crichton;W. G. Marshall;K. Friese
The room-temperature high-pressure behaviour of PbWO4 and BaWO4 scheelites (I41/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.
