Compressibilities and high‐pressure phase transitions of sodium tungstate perovskites (NaxWO3)
作者： R. M. Hazen , L. W. Finger
DOI: 10.1063/1.333964
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摘要: Unit‐cell parameters of the sodium tungstate perovskites, NaxWO3(x=0.55, 0.62, and 0.70), have been determined at a number pressures to 5.3 GPa with single‐crystal x‐ray diffraction techniques. Pseudocubic Na0.55WO3 Na0.62WO3 (probably tetragonal, C4/mmb, c>a room pressure) compressibilities 0.0095(1) 0.0084(1) GPa−1, respectively. The perovskite compresses uniformly pressure 4.2 GPa, but transforms reversibly 1.8(1) second single phase (presumably I4/mmm) c
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