SYNTHESIS AND STRUCTURE OF BA4CACU2.24O6.96(CO3)0.5, A PEROVSKITE CONTAINING CARBONATE ANIONS, AND RELATED PHASES

被引：40
作者：
GREAVES, C
SLATER, PR
机构：
来源：
JOURNAL OF MATERIALS CHEMISTRY | 1991年 / 1卷 / 01期
关键词：
BARIUM CALCIUM COPPER OXIDE; PEROVSKITE; OXIDE CARBONATE; NEUTRON DIFFRACTION;
D O I：
10.1039/jm9910100017
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：
Calcination of appropriate mixtures of BaCO3, CaCO3 and CuO has been shown to result in a tetragonal [P4/mmm; a = 5.799(2) angstrom, c = 7.992(3) angstrom] perovskite-related phase containing CO3(2-) anions. The unit-cell composition is Ba4CaCu2.24O6.96(CO3)0.5, and powder neutron diffraction has demonstrated that the octahedral sites are occupied by Ca, Cu and C in an ordered fashion. The structure is compared with the cubic phase Ba4CaCu3O8.61. Related phases in which the Ca ions are replaced by other cations are also reported.
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页码：17 / 21
页数：5
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