A Structural Study of Phase Transitions in [N (CH_3)_4]_2ZnCl_4 at Low Temperature
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概要
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The crystal structures of the monoclinic low-tervtperature phase (phase V) at 161 Kand the threefold-modulated orthorhombic phase (phase Vl) at 149 K of [N(CH.).1.ZnCl. are determined. The crystal structure of the threefold-modulated monoclinicphase (phase IV) at 223 K is also reexamined in order to investigate the structural relalion to other phases. The modulation pattern of the fivefold-modulated orthorhom-bic phase (phase III) reported previously is interpreted to be constructed with that ofphase IV. The structural changes on the phase transitions from the disordered phase(phase I) to phase V are described mainly by the rotations about the b- and c-axes andthe translations along the v-axis of ZnCl. and one kind of N(CH.).. On the phase Iransition from phase V to phase Vl, the magnitudes of the displacements of each iotasalong the b- and c-axes become larger than those on other phase transitions.[ bis (tetramethylammonium) tetrachlorozincate (II), crystal structure, X-ray lj diffractometry, structural phase transitionI
- 社団法人日本物理学会の論文
- 1992-01-15
著者
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MASHIYAMA Hiroyuki
Department of Physics,Faculty of Science,Yamaguchi University
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Mashiyama Hiroyuki
Department Of Physics Biology And Informatics Faculty Of Science Yamaguchi University
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Kasano Hironobu
Department Of Physics Faculty Of Science Yamaguchi University
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Koshiji Naohiro
Department Of Physics Faculty Of Science Yamaguchi University:kurume College Of Technology
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Koshiji Naohiro
Department Of Physics Faculty Of Science Yamaguchi University
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