Phase transition, thermal expansion and electrical properties of BiCu2VO6
作者： Ivana Radosavljević Evans , Shanwen Tao , John T.S. Irvine
DOI: 10.1016/J.JSSC.2005.07.006
关键词:
摘要: Phase transition in BiCu{sub 2}VO{sub 6} has been studied by variable temperature powder and single crystal X-ray diffraction. A reversible single-crystal-to-single-crystal phase identified the high-temperature {beta}-BiCu{sub polymorph structurally characterized. is monoclinic I-centered related to {alpha}-form a subgroup-supergroup relationship. Bi atoms are coordinated oxygen so as give rise (BiO{sub 2}){sup -} chains parallel c-axis. The magnetic Cu-O sublattice forms complex system of quasi one-dimensional ladders, built up five- six-coordinate Cu atoms. Dynamic disorder high structure can be described terms librational motion VO{sub 4} tetrahedral group. AC impedance measurements suggest predominantly electronic conduction this material. -- Graphical abstract:.
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