Bulletin of Shimane Medical University

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Bulletin of Shimane Medical University 2
1979-12-01 発行

Temperature Dependence of the NQR Frequencies in SnBr_4 and SnI_4

Mishima, Mitsuo
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Description
The nuclear quadrupole resonances for ^<81>Br and ^<127>I were observed in polycrystalline SnBr4 and SnI_4 at temperature between liquid nitrogen and room temperature. In SnBr_4 the phase transition between α-form and β-form was observed at 13.5±0.5℃. In α-SnBr_4 the assignment was discussed in a qualitative way in terms of the anisotropy in the thermal motions of molecule. In β-SnBr_4 and SnI_4 the splitting of the resonance signals was correlated with molecular oscillations and intermolecular interactions.