Structural phase transitions of pyridinium tetrafluoroborate

被引：9

作者：

Czarnecki, P

Wasicki, J

Katrusiak, A

Ecolivet, C

Girard, A

Belushkin, A

机构：

[1] ADAM MICKIEWICZ UNIV POZNAN,INST CHEM,PL-61614 POZNAN,POLAND

[2] UNIV RENNES 1,GRP MAT CONDENSEE & MAT,RENNES,FRANCE

[3] JINR,DUBNA,RUSSIA

来源：

PHYSICA B | 1997年 / 234卷

关键词：

powder diffraction; Raman spectroscopy; structural transitions;

D O I：

10.1016/S0921-4526(96)00896-4

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We performed Raman scattering measurements of lattice modes and powder neutron diffraction measurements to test the symmetry changes in pyridinium tetrafluoroborate (PyBF4) caused by the phase transitions at temperatures 240 and 205 K. From the powder diffraction data obtained we found out the sequence of phase transitions in PyBF4: R (3) over bar m ((240K)) under right arrow C2 ((240K)) under right arrow P2. The number of lattice modes found in the Raman scattering experiment is in agreement with the lowering of symmetry.

引用

页码：102 / 103

页数：2