AN X-RAY-SCATTERING STUDY OF THE LOW-TEMPERATURE PHASE-TRANSITIONS OF LIKSO4

被引：11
|
作者：
DESERT, A [1 ]
GIBAUD, A [1 ]
RIGHI, A [1 ]
LEITAO, UA [1 ]
MOREIRA, RL [1 ]
机构：
[1] UNIV FED MINAS GERAIS, ICEX, DEPT FIS, BR-30161970 BELO HORIZONTE, MG, BRAZIL
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 1995年 / 7卷 / 44期
关键词：
D O I：
10.1088/0953-8984/7/44/013
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
X-ray diffraction studies on solution-grown LiKSO4 have been performed between 70 K and 300 K. The lattice parameters have been obtained as a function of the temperature. The hexagonal to trigonal phase transition at 205 K is seen by a slight increase of the c lattice parameter, while the ferroelastic transition at 182 K is accompanied by the appearance of an important spontaneous elastic deformation. The deformation and the domain pattern are analysed via a 'squeezing' model of the hexagonal lattice which leads to a monoclinic lattice below T-c = 182 K.
引用
收藏
页码：8445 / 8452
页数：8
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