The Phase Transition of Crystalline Potassium Thiocyanate, KSCN. I. Thermal and Infrared Studies
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概要
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The phase transition of the potassium thiocyanate crystal at ca. 140°C has been studied by thermal and infrared methods. The transition is of a higher-order type, accompanied by an entropy change of 1.30±0.05 e. u., which is nearly equal to <I>R</I> ln 2. The infrared band due to the in-plane bending vibration of a thiocyanate ion shifts to lower frequencies in the course of the phase transition. From these results, it has been concluded that the phase transition is connected with the dynamical disordering of the direction of thiocyanate ions in crystal, a disordering which is mainly brought about by the frequent excitation of the out-of-plane torsional oscillation and the flipping motion.
- 社団法人 日本化学会の論文
著者
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Seki Syuzo
Department Of Chemistry Faculity Of Science Osaka University
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Suga Hiroshi
Department Of Chemistry Faculty Of Science Osaka University
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Sakiyama Minoru
Department of Chemistry Faculty of Science Osaka University
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Sakiyama M.
Department of Chemistry Faculty of Science Osaka University
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