Cation disorder in Pb-doped SrBi2Nb2O9

被引：15
|
作者：
Kennedy, BJ
Hunter, BA
机构：
[1] Univ Sydney, Ctr Heavy Met Res, Sch Chem, Sydney, NSW 2006, Australia
[2] Australian Nucl Sci & Technol Org, Menai, NSW 2234, Australia
来源：
CHEMISTRY OF MATERIALS | 2001年 / 13卷 / 12期
关键词：
D O I：
10.1021/cm010327e
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：
Cation disorder in Pb1-x, SrxBi2Nb2O9 has been studied using a combination of powder synchrotron X-ray and neutron diffraction methods. The oxides all adopt an orthorhombic structure, space group A2(1)am in which the A-type cations, Sr and Pb, are disordered over the Bi2O2 and perovskite layers. Although the Ph shows a marked preference for the Bi2O2 layers, relative to that of Sr, there are still appreciable amounts of Sr present in the Bi2O2 layers. This is discussed in terms of local bonding effects and bond valence sum analysis.
引用
收藏
页码：4612 / 4617
页数：6
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