α-Bi2Sn2O7 -: a 176 atom crystal structure from powder diffraction data

被引：61

作者：

Evans, IR ^{[1
]}

Howard, JAK ^{[1
]}

Evans, JSO ^{[1
]}

机构：

[1] Univ Durham, Dept Chem, Durham DH1 3LE, England

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2003年 / 13卷 / 09期

关键词：

D O I：

10.1039/b305211g

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Pyrochlore-type bismuth tin oxide, Bi2Sn2O7, is a technologically important material used in applications such as catalysis and gas sensing. Its room temperature structure has been solved by a method of simulated annealing of combined X-ray and neutron diffraction data, followed by Rietveld refinement. With 176 crystallographically independent atoms in the asymmetric unit, it is one of the largest structures solved to-date from powder diffraction data. In addition to the number of unique atoms, additional crystallographic difficulty stems from the fact that the true symmetry of this structure is lower than the apparent metric symmetry of the unit cell.

引用

页码：2098 / 2103

页数：6

共 36 条

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