Local Structure Analysis of Bi2WO6
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概要
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A local structure analysis of Bi2WO6 was performed by high-energy X-ray atomic pair-distribution function (PDF) analysis. We found a deviation between the local and average structures owing to the different coherence lengths between the Bi2O2 and WO6 layers. Bi atoms were displaced toward the b-axis of the orthorhombic Pca2_{1} structure. The local off-center shift of Bi atoms coupled with the thermal factor but not with the average structure and thus was neglected. The coherence length of the Bi2O2 layer increased with increasing temperature and spread in the whole crystal when the average structure changed from the Pca2_{1} structure to the Aba2 structure.
- 2012-09-25
著者
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KOHARA Shinji
Japan Synchrotron Radiation Research Institute
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Yoneda Yasuhiro
Reaction Dynamics Research Division, Japan Atomic Energy Agency (JAEA), Sayo, Hyogo 679-5148, Japan
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Takeda Hiroaki
Graduate School of Material Science, Nara Institute of Science and Technology (NAIST), 8916-5 Takayama-cho, Ikoma, Nara 630-0192, Japan
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Tsurumi Takaaki
Graduate School of Materials Science and Technology, Tokyo Institute of Technology, Meguro, Tokyo 152-8552, Japan
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