THE STRUCTURE OF LI3CU2O4, A COMPOUND WITH FORMAL MIXED-VALENCE

被引：15
作者：
BERGER, R [1 ]
ONNERUD, P [1 ]
LALIGANT, Y [1 ]
LEBAIL, A [1 ]
机构：
[1] UNIV MAINE,FLUORURES LAB,CNRS,URA 449,F-72017 LE MANS,FRANCE
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 1993年 / 190卷 / 02期
关键词：
D O I：
10.1016/0925-8388(93)90415-J
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：
The structure of Li3Cu2O4 was solved from X-ray powder diffraction data and refined from a multiphase specimen using the Rietveld method. The cuprate crystallizes in C2/m with Z = 2. The compound has a small homogeneity range. Typical parameters are a = 9.946(5) angstrom, b = 2.778(2) angstrom, c = 7.260(5) angstrom and beta = 119.10(2)-degrees. The structure may be described as an ordered intergrowth of slabs of Li2CuO2 and hypothetical LiCuO2 of NaCuO2 type. The formula suggests a copper(II, III) mixture, but there is only one crystallographic copper site which implies a more appropriate formulation as Li3+[Cu(II)O2]2-3/2 with parallel strands of edge-coupled CuO4 units running along the b axis.
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页码：295 / 299
页数：5
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