The An+2BnB′O3n+3 family (B=B′=Co):: Ordered intergrowth between 2H-BaCoO3 and Ca3Co2O6 structures
The An+2BnB′O3n+3 family (B=B′=Co):: Ordered intergrowth between 2H-BaCoO3 and Ca3Co2O6 structures
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DOI：
10.1006/jssc.1999.8230
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发表时间：
1999-06-01
影响因子：
3.3
通讯作者：
González-Calbet, JM
中科院分区：
文献类型：
--
作者：
Boulahya, K;Parras, M;González-Calbet, JM
用选区电子衍射和高分辨电子显微术对保持B = B' = Co不变的A（n+2）B（n）B' O 3 n +3同系的n个整数成员进行了表征。它的相称调制结构是由链，由A原子分开，沿沿着c方向运行，包含一个Co原子（B '）在棱柱形三角形网站和八面体协调共享面的n个Co原子的连续。它们都可以被描述为该家族的两种末端成员2 H-BaCoO 3（n =无穷大）和Ca 3Co 2 O 6（n = 1）结构的有序共生体。在所有条款中观察到的调制可以被描述为Co子晶格的c轴相对于2 H结构之间的差异的函数。该系列的成员可以通过改变层之间的距离来获得，保持B = Co相同，如（Sr 1-xBax）（6）Co 5 O 15（n = 4）、Sr 5Co 4 O 12（n = 3）和（Sr 0.5Ca 0.5）（4）Co 3 O 9（n = 2）所示。(C)北京：科学出版社.
The n integer members of the A(n+2)B(n)B'O3n+3 homologous series keeping B = B' = Co the same have been characterized by selected area electron diffraction and high resolution electron microscopy. Its commensurate modulated structure is made up of chains, separated by A atoms, running along the c direction containing a succession of one Co atom (B') in prismatic trigonal sites and n Co atoms octahedrally coordinated sharing faces. All of them can be described as ordered intergrowths of two structures of the end members of the family, 2H-BaCoO3 (n = infinity) and Ca3Co2O6 (n = 1). The modulation observed in all terms can be described as a function of the difference between the c-axis of the Co sublattice with respect to the 2H structure. Members of the series can be obtained by modifying the distance between layers keeping B = Co the same, as shown in (Sr1-xBax)(6)Co5O15 (n = 4), Sr5Co4O12 (n = 3), and (Sr0.5Ca0.5)(4)Co3O9 (n = 2). (C) 1999 Academic Press.