Structure for perovskites with layered ordering of A-site cations

被引：50
作者：
Howard, CJ [1 ]
Zhang, ZM [1 ]
机构：
[1] Australian Nucl Sci & Technol Org, Menai, NSW 2234, Australia
来源：
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE | 2004年 / 60卷 / 02期
关键词：
D O I：
10.1107/S0108768104003714
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The structure of La1/3NbO3 is that of a perovskite with La3+ cations ordered into alternate layers of perovskite A-sites. This is the description of a tetragonal structure and yet the room-temperature structure shows an orthorhombic distortion. The structure of La2/3TiO3 shows similar features. It has been recognized only very recently that the orthorhombic distortion in both these compounds is due to octahedral tilting. It seems clear from the literature that Ce2/3TiO3, Pr2/3TiO3, Nd2/3TiO3 and Ce1/3NbO3 adopt the same structure. Structures of other perovskites, such as Ln(2/3)TiO(3), Ln(1/3)NbO(3) and Ln(1/3)TaO(3) ( Ln = lanthanoid), when orthorhombically distorted, may be similar.
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页码：249 / 251
页数：3
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