期刊
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE
卷 64, 期 -, 页码 645-651出版社
WILEY-BLACKWELL
DOI: 10.1107/S0108768108033053
关键词
-
Dioxotetrafluorotungstates (NH(4))(2)WO(2)F(4) [(I) at 297 K and (II) at 133 K] and Rb(2)WO(2)F(4) (III) were synthesized in a single-crystal form and their structures were determined by Xray diffraction. Two independent states of the cis-WO(2)F(4) octahedron are characteristic of static and dynamic disorder in structure (I). Dynamically disordered W2 is displaced from the symmetry axis producing four possible orientations of anion that permits O and F atoms to be identified in separate orientations owing to the inherent differences between W-O and W-F bonding. After the phase transition at lower temperature (201 K), (I) transforms into the twin structure (II) with complete O/F ordering. Structure (III) is characterized by full O/F static disorder without any phase transitions at lower temperature.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据