Synthesis and structure of two new bismuth cadmium vanadates, BiCdVO5 and BiCd2VO6, and structures of BiCa2AsO6 and BiMg2PO6

被引:29
作者
Radosavljevic, I
Howard, JAK
Sleight, AW
机构
[1] Oregon State Univ, Dept Chem, Corvallis, OR 97331 USA
[2] Univ Durham, Dept Chem, Durham DH1 3LN, England
来源
INTERNATIONAL JOURNAL OF INORGANIC MATERIALS | 2000年 / 2卷 / 06期
基金
美国国家科学基金会;
关键词
oxides; neutron scattering; X-ray diffraction; ferroelectricity; optical properties;
D O I
10.1016/S1466-6049(00)00080-5
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The new compound BiCdVO5 was synthesized and its structure was determined by single crystal X-ray diffraction. This compound crystallizes in the acentric polar space group Pc2(1)n with cell dimensions of a=5.505(2), b=11.699(4), and c=14.276(4) Angstrom. Bi(III) is five-coordinate and its environment is distorted tetragonal pyramidal. These pyramids share edges to form ribbons parallel to the a axis. The two Cd(II) sites exhibit a distorted octahedral environment, and the two V(V) sites show a distorted tetrahedral environment. The new compound BiCd2VO6 was found to be isostructural with BiCa2VO6, and its structure was refined from X-ray powder diffraction data. The structures of BiCa2AsO6 and BiMg2PO6 were refined from neutron powder diffraction data and are compared to those of BiCd2VO6 and BiCa2VO6. All four compounds described have (Bi-O-2)(-) ribbons. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:543 / 550
页数:8
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