Temperature evolution of the crystal structure of AgNbO3

被引：76

作者：

Ratuszna, A ^{[1
]}

Pawluk, J ^{[1
]}

Kania, A ^{[1
]}

机构：

[1] Silesian Univ, Inst Phys, PL-40007 Katowice, Poland

来源：

PHASE TRANSITIONS | 2003年 / 76卷 / 06期

关键词：

AgNbO3; perovskite crystals; structural phase transitions; X-ray powder diffraction;

D O I：

10.1080/0141159021000009007

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

X-ray powder diffraction patterns of the AgNbO3 have been obtained in a wide temperature range: from room temperature up to 850K. The type of distortion and the multiplicity of the pseudo-cubic perovskite cell has been determined from the splitting of the main diffraction lines and from analysis of the superlattice peaks. The scheme of oxygen octahedra tilting and the sequence of the distorted pseudocubic cell is: monoclinic (M1) --> monoclinic(M-3)(a-b+a-) --> orthorhombic(O-1)(adegreesb+c-) --> tetragonal(T)(adegreesadegreesc-) --> cubic (C)(adegreesadegreesadegrees).

引用

页码：611 / 620

页数：10

共 17 条

[1] An X-ray diffraction study of AgNbO3 and comparison with NaNbO3 [J].