Neutron powder diffraction study of phase transitions in Sr2SnO4

被引：20

作者：

Fu, WT

Visser, D

Knight, KS

IJdo, DJW

机构：

[1] Leiden Univ, Leiden Inst Chem, Gorlaeus Labs, NL-2300 RA Leiden, Netherlands

[2] Rutherford Appleton Lab, ISIS Facil, NWO Phys, Didcot OX11 0QX, Oxon, England

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2004年 / 177卷 / 11期

关键词：

high-resolution neutron powder diffraction; crystal structure; phase transition;

D O I：

10.1016/j.jssc.2004.08.023

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The phase transitions in Sr2SnO4 at high temperature have been studied using high resolution time-of-flight powder neutron diffraction. The room temperature structure of Sr2SnO4 is orthorhombic (Pccn), which can be derived from the tetragonal K2NiF4 structure by tilting the SnO6 octahedra along the tetragonal [100](T)- and [010](T)-axes with non-equal tilts. At the temperature of about 423 K, it transforms to another orthorhombic structure (Bmab) characterized by the SnO6 octahedral tilt around the [110](T)-axis. At still higher temperatures (similar to573 K) the structure was found to be tetragonal K2NiF4-type (I4/mmm). (C) 2004 Elsevier Inc. All rights reserved.

引用

页码：4081 / 4086

页数：6

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