Phase Transition in the Ionic Modification of Phosphorus Pentachloride, [PCl<SUB>4</SUB>][PCl<SUB>6</SUB>]. Chlorine Nuclear Quadrupole Resonance Study
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概要
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Chlorine-35 nuclear quadrupole resonance frequencies in the ionic crystal PCl<SUB>4</SUB><SUP>+</SUP>·PCl<SUB>6</SUB><SUP>−</SUP> were redetermined. Ten resonance lines were found and their temperature dependences were measured below the second order phase transition point at 102 K. The splitting <I>Δv<SUB>i</SUB></I> in the resonance lines in the low temperature phase showed a similar temperature dependence as the order parameter. This was accounted for by a librational soft mode theory based on an anharmonic coupling between molecular or ionic librational modes in the crystal.
- 公益社団法人 日本化学会の論文
著者
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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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