81Br nuclear quadrupole resonance of Cs2ZnBr4 and crystal stability of compounds of A2MX4 type.
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概要
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The temperature dependences of <SUP>81</SUP>Br nuclear quadrupole resonance frequencies and quadrupolar relaxation times of Cs<SUB>2</SUB>ZnBr<SUB>4</SUB> were measured. The librational motion of [ZnBr<SUB>4</SUB>]<SUP>2−</SUP> about the Zn–Br axis parallel to the a axis in the crystal is more active than those about the other axes. The reason why this compound shows no phase transition can be accounted for by the molecular packing, especially the packing of [ZnBr<SUB>4</SUB>]<SUP>2−</SUP> along the a axis. General examination of the relative size of cation/anion in the class of compounds of A<SUB>2</SUB>MX<SUB>4</SUB> type led to a criterion which may be used to rationalize existence and absence of a phase transition.
- 公益社団法人 日本化学会の論文
著者
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NAKAYAMA HIROKAZU
Department of Biology, Graduate School of Science, Osaka City University
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Nakamura Nobuo
Department Of Cardiology Seiyu Memorial Hospital
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Chihara Hideaki
Department Of Chemistr Faculty Of Science Osaka University
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