Structural phase transition in a perovskite-type NH3(CH2)3NH3CuCl4 crystal - X-ray and optical studies

被引：28

作者：

Czapla, Z. ^{[1
]}

Przeslawski, J. ^{[2
]}

Crofton, M. ^{[2
]}

Janczak, J. ^{[3
]}

Czupinski, O. ^{[4
]}

Ingram, A. ^{[1
]}

Kostrzewa, M. ^{[1
]}

机构：

[1] Opole Univ Technol, Dept Phys, Opole, Poland

[2] Univ Wroclaw, Inst Expt Phys, Wroclaw, Poland

[3] Inst Low Temp & Struct Res PAS Wroclaw, Wroclaw, Poland

[4] Univ Wroclaw, Fac Chem, Wroclaw, Poland

来源：

PHASE TRANSITIONS | 2017年 / 90卷 / 06期

关键词：

Organic-inorganic compounds; phase transitions; X-ray diffractometry; linear birefringence; ferroelastic domains;

D O I：

10.1080/01411594.2016.1252983

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

X-ray powder studies and optical studies (polarized microscopic observation and linear birefringence studies) of the crystal NH3(CH2)(3)NH3CuCl4 are presented. The X-ray powder studies revealed a change of symmetry from orthorhombic room-temperature phase to monoclinic phase above 434 K. A reversible phase transition of the first order at 434 K on heating and 432 K on cooling was observed in birefringence studies. Optical polarized microscopic observation revealed monodomain and multidomain states in the room-temperature orthorhombic phase with domain walls in (110) and (1-10) planes. The hypothetical prototypic phase is expected to be tetragonal. The change of symmetry from orthorhombic to monoclinic and expected domain structure was found above 434 K in the (010) plane.

引用

页码：637 / 643

页数：7

共 14 条

[1] POSSIBLE SPECIES OF FERROELASTIC CRYSTALS AND OF SIMULTANEOUSLY FERROELECTRIC AND FERROELASTIC CRYSTALS [J].