Atomic structure of Sr0.75Ba0.25Nb2O6 single crystal and composition-structure-property relation in (Sr,Ba)Nb2O6 solid solutions

被引：61

作者：

Chernaya, TS

Maksimov, BA

Volk, TR

Ivleva, LI

Simonov, VI

机构：

[1] Russian Acad Sci, AV Shubnikov Crystallog Inst, Moscow 117333, Russia

[2] Russian Acad Sci, Inst Gen Phys, Moscow 117942, Russia

来源：

PHYSICS OF THE SOLID STATE | 2000年 / 42卷 / 09期

关键词：

D O I：

10.1134/1.1309457

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The structure of the Sr0.75Ba0.25Nb2O6 single crystal has been investigated by x-ray diffraction. The occupancies of the Ba and Sr sites in two structural channels are determined. It is found that these sites are split in the large (pentagonal) channel. A qualitative correlation is revealed between the smearing of the phase transition and the displacement of the Sr atom from the m symmetry plane in the pentagonal channel at different [Sr]/[Ba] ratios. The degree of acentricity of the NbO6 octahedra is analyzed as a function of the [Sr]/[Ba] ratio. (C) 2000 MAIK "Nauka/ Interperiodica".

引用

页码：1716 / 1721

页数：6

共 15 条

[1]

Andreichuk A. E., 1984, Soviet Physics - Crystallography, V29, P641

[2] CHAOTIC STATES OBSERVED IN STRONTIUM BARIUM NIOBATE [J].