NOVEL CU6O15 BOWLS IN 7 NEW BARIUM COPPER OXIDES - M6BA46CU24O84 (M = AL, SI, TI, FE, GA, GE, ZR)

被引：12

作者：

VERNOOY, PD ^{[1
]}

DIXON, MA ^{[1
]}

HOLLANDER, FJ ^{[1
]}

STACY, AM ^{[1
]}

机构：

[1] UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720

来源：

INORGANIC CHEMISTRY | 1990年 / 29卷 / 15期

关键词：

D O I：

10.1021/ic00340a023

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Large single crystals of a nonstoichiometric oxide with nominal formula Al6Ba46Cu24O84 (per unit cell) were grown by slow cooling of a mixture of alumina and cupric oxide in a barium hydroxide-barium chloride flux. Single-crystal X-ray methods revealed hexagonal Laue symmetry with unit cell dimensions a = 13.1524 (11) Å and c = 17.3122 (15) Å. The structure was refined in the space group P63mc to an R value of 1.8%. This compound has a novel layered structure, and all the copper atoms are in unique bowl-shaped rings of composition Cu6O15. The crystals are shiny, black, hexagonal plates, and resistance measurements show that the compound is semiconducting. Magnetic measurements indicate that the bowls exhibit a spin 3/2 ground state. Si6-Ba46Cu24O84, Ti6Ba46Cu24O84, Fe6Ba46Cu24O84, Ga6Ba46Cu24O84, Ge6Ba46Cu24O84, and Zr6Ba46Cu24O84 were prepared by similar methods and found to be isomorphous. © 1990, American Chemical Society. All rights reserved.

引用

页码：2837 / 2841

页数：5

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