X-RAY STUDY OF THE PHASE-TRANSITIONS IN K3D(SO4)2 AND K3H(SO4)2

被引：32

作者：

NODA, Y

WATANABE, Y

KASATANI, H

TERAUCHI, H

GESI, K

机构：

[1] IWAKI MEISEI UNIV,COLL SCI & ENGN,IWAKI 970,JAPAN

[2] KWANSEI GAKUIN UNIV,SCH SCI,NISHINOMIYA,HYOGO 662,JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1991年 / 60卷 / 06期

关键词：

PHASE TRANSITION; HYDROGEN BOND MATERIAL; K3H(SO4)2; ISOTOPE EFFECT; X-RAY DIFFRACTION;

D O I：

10.1143/JPSJ.60.1972

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Structural phase transition of K3D(SO4)2 was studied by X-ray scattering experiments, and new reflections were observed below T(c) = 85 K. The space groups are A2/a (Z = 4) above T(c) and P2(1)/a (Z = 4) below T(c). The postulated structure of the low temperature phase has an antipolar character. Temperature dependence of lattice parameters was also investigated, whose anomaly below T(c) was marginally small. The deviation from the curve calculated by the Debye approximation was utilized to estimate the nature of the order parameter. Similar experiments in K3H(SO4)2 have not shown any evidence of the phase transition.

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页码：1972 / 1977

页数：6

相关论文

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