Structure of Compounds in the Sr1–3x/2CexTiO3 Homologous Series
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- 作者：Rick Ubic ; Ganesanpotti Subodh ; Mailadil T. Sebastian ; Delphine Gout ; Thomas Proffen
- 刊名：Chemistry of Materials
- 出版年：2008
- 出版时间：May 13, 2008
- 年：2008
- 卷：20
- 期：9
- 页码：3127 - 3133
- 全文大小：1010K
- 年卷期：v.20,no.9(May 13, 2008)
- ISSN：1520-5002
文摘
Four compositions in the Sr1–3x/2CexTiO3 homologous series, corresponding to x = 0.1333, 0.1667, 0.25, and 0.4, have been produced by conventional solid-state processing. The structure of these compounds was analyzed by X-ray, electron, and neutron diffraction. While no superlattice can be observed via X-ray diffraction, both electron and neutron diffraction show evidence of a noncubic supercell caused by antiphase tilting of oxygen octahedra. The most likely space group is R3̅c, corresponding to an a−a−a− tilt system, except for the composition x = 0.4, for which an even more complex superstructure is observed. The degree of tilt increases with increasing x.