Cation Deficiency in (Ba, Sr)Co1−xOyHexagonal Perovskite Related Oxides: New Members of theAn+2B′BnO3n+3Homologous Series
Cation Deficiency in (Ba, Sr)Co1−xOyHexagonal Perovskite Related Oxides: New Members of theAn+2B′BnO3n+3Homologous Series
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(Ba, Sr)Co1−xOy 六方钙钛矿相关氧化物中的阳离子缺陷：An+2B′BnO3n+3 同系物的新成员
DOI：
10.1006/jssc.1998.8057
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发表时间：
1999
影响因子：
5.4
通讯作者：
J. González
中科院分区：
文献类型：
--
作者：
K. Boulahya;M. Parras;J. González
摘要通过电子衍射和高分辨率电子显微镜分析，发现新相（ba0.5 Sr 0.5） 7co6o18、ba8 co7o21和ba9 co8o12是2H六方钙钛矿相关的an + 2b′bn + 3n +3同源系列的三个新成员（n =5、n =6和n =7）。它们的调制结构由沿c方向的链组成，由Ba（Sr）离子分隔，包含一个Co原子在棱柱三角位和n个Co原子在八面体配位共享面。根据氧化铝层间的距离，讨论了该族不同项的合成策略。
Abstract The new phases (Ba 0.5 Sr 0.5 ) 7 Co 6 O 18 , Ba 8 Co 7 O 21 , and Ba 9 Co 8 O 12 have been shown by electron diffraction and high-resolution electron microscopy to be three new members ( n =5, n =6, and n =7) of the 2H hexagonal perovskite-related A n +2 B ′ B n O 3 n +3 homologous series. Their modulated structures are made up of chains, running along the c direction and separated by Ba(Sr) ions, containing a succession of one Co atom in prismatic trigonal sites and n Co atoms in octahedral coordination sharing faces. The strategy to synthesize different terms of this family is discussed in terms of the distance between A O 3 layers.