On the ordering in [(C2H5)(4)N]2CuCl4 crystal: An X-ray study and theoretical considerations

被引：19

作者：

Mahoui, A ^{[1
]}

Lapasset, J ^{[1
]}

Sannikov, DG ^{[1
]}

Moret, J ^{[1
]}

SaintGregoire, P ^{[1
]}

机构：

[1] RUSSIAN ACAD SCI, INST CRYSTALLOG, MOSCOW 117333, RUSSIA

来源：

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1996年 / 99卷 / 04期

关键词：

D O I：

10.1007/s002570050074

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The crystal structure of [(C2H5)(4)N]2CUCl4 has been determined by X-ray diffraction at 243K. The room temperature phase (phase I) belongs to the space group P4(2)/nm [1] whereas the low temperature phase (phase II) is orthorhombic and belongs to the space group Pnna. The phase transition at T-c = 258K is of improper ferroelastic type and it is associated with the ordering of the CuCl42- and a partial ordering of the [(C2H5)(4)N](+) ions which are disordered in the high temperature tetragonal phase. At lower temperature, there occurs another instability which could correspond to a complete ordering in the crystal.

引用

页码：543 / 549

页数：7

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