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.

引用

页码：295 / 299

页数：5

共 20 条

[1]

BERGER R, 1988, CHEM SCRIPTA, V28, P41

[2] A NOTE ON THE LI-CU-O SYSTEM [J].

BERGER, R .

JOURNAL OF THE LESS-COMMON METALS, 1991, 169 (01) :33-43

[3] THE STRUCTURE OF LICU2O2 WITH MIXED-VALENCE COPPER FROM TWIN-CRYSTAL DATA [J].

BERGER, R ;

MEETSMA, A ;

VANSMAALEN, S ;

SUNDBERG, M .

JOURNAL OF THE LESS-COMMON METALS, 1991, 175 (01) :119-129

[4] STRUCTURE REFINEMENTS OF LICU2O2 AND LICU3O3 FROM NEUTRON POWDER DIFFRACTION DATA [J].

BERGER, R ;

ONNERUD, P ;

TELLGREN, R .

JOURNAL OF ALLOYS AND COMPOUNDS, 1992, 184 (02) :315-322

[5] CRYSTAL-STRUCTURES OF NACUO2 AND KCUO2 BY NEUTRON-DIFFRACTION [J].

BRESE, NE ;

OKEEFFE, M ;

VONDREELE, RB ;

YOUNG, VG .

JOURNAL OF SOLID STATE CHEMISTRY, 1989, 83 (01) :1-7

[6]

DACHS H, 1959, Z KRISTALLOGR, V112, P60, DOI DOI 10.1524/ZKRI.1959.112.1-6.60

[7] REFINING THE CRYSTAL-STRUCTURE OF LITHIUM-CARBONATE, LI2CO3 [J].

EFFENBERGER, H ;

ZEMANN, J .

ZEITSCHRIFT FUR KRISTALLOGRAPHIE, 1979, 150 (1-4) :133-138

[8] LICU2O2 AND LICU3O3 - NEW MIXED VALENT COPPER OXIDES [J].

HIBBLE, SJ ;

KOHLER, J ;

SIMON, A ;

PAIDER, S .

JOURNAL OF SOLID STATE CHEMISTRY, 1990, 88 (02) :534-542

[9]

HILL RJ, 1986, M112 AUSTR AT EN COM

[10] NEUTRON-DIFFRACTION ON LI2CUO2 [J].

HOFFMANN, R ;

HOPPE, R ;

SCHAFER, W .

ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 1989, 578 (11) :18-26

← 1 2 →