首页> 外文期刊>Journal of Solid State Chemistry >Synthesis and structural studies of lanthanide substituted bismuth-titanium pyrochlores
【24h】

Synthesis and structural studies of lanthanide substituted bismuth-titanium pyrochlores

机译:镧系取代铋钛烧绿石的合成与结构研究

获取原文
获取原文并翻译 | 示例
           

摘要

The identity of the pyrochlore phase seen during the synthesis of ferroelectric Bi(4-x)Ln(x)Ti(3)O(12) Aurivillius oxides is shown to be Bi(2/3)Ln(4/3)Ti(2)O(7). This pyrochlore is only stable for Ln(3+) = Sm3+ or smaller. For larger lanthanides the layered Aurivillius oxide is favoured. The presence of six-fold disorder, associated with the Bi 6s(2) lone pair electrons, is believed to stabilise the unexpected stoichiometry of this oxide. Precise structures, obtained by Rietveld refinement from synchrotron X-ray diffraction data, of three examples Ln(3+) = Eu, Ho and Yb are presented.
机译:铁电Bi(4-x)Ln(x)Ti(3)O(12)Aurivillius氧化物的合成过程中看到的烧绿石相的标识为Bi(2/3)Ln(4/3)Ti( 2)O(7)。该烧绿石仅在Ln(3+)= Sm3 +或更小时才稳定。对于较大的镧系元素,倾向于层状氧化金。与Bi 6s(2)孤对电子相关的六重无序的存在被认为可以稳定该氧化物的意外化学计量。提出了通过Rietveld改进从同步加速器X射线衍射数据获得的三个实例Ln(3+)= Eu,Ho和Yb的精确结构。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号