Lattice dynamics and phase transitions in KAl(MoO4)2, RbAl(MoO4)2 and CsAl(MoO4)2 layered crystals

被引：19
|
作者：
Maczka, M
Hermanowicz, K
Tomaszewski, PE
Hanuza, J
机构：
[1] Polish Acad Sci, Inst Low Temp & Struct Res, PL-50950 Wroclaw 2, Poland
[2] Wroclaw Univ Econ, Fac Ind & Econ, Dept Bioorgan Chem, PL-53345 Wroclaw, Poland
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2004年 / 16卷 / 20期
关键词：
D O I：
10.1088/0953-8984/16/20/003
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Raman and IR studies of KAl(MoO4)(2), RbAl(MoO4)(2) and CsAl(MoO4)(2) are reported. The assignments of modes are given on the basis of lattice dynamics calculations. The temperature dependence of the KAl(MoO4)(2) vibrational modes shows that this compound exhibits a second-order phase transition around 90 K from the P (3) over bar m1 to most probably a monoclinic and ferroelastic phase.
引用
收藏
页码：3319 / 3328
页数：10
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