EVIDENCE FOR SHORT Cu(I)-Cu(I) DISTANCES IN COPPER-EXCESS SPINELS FROM EXAFS

被引:4
|
作者
Benazeth, S. [1 ]
Danot, M. [2 ]
Colombet, P. [2 ]
Dexpert, H. [3 ]
Lagarde, P. [3 ]
机构
[1] Univ Paris 05, Lab Chim Minerale Struct, UA 200, F-75270 Paris 06, France
[2] Univ Nantes, Lab Chim Solides, UA 279, F-44072 Nantes, France
[3] Univ Paris 11, LURE, CNRS UPS, F-91405 Orsay, France
来源
JOURNAL DE PHYSIQUE | 1986年 / 47卷 / C-8期
关键词
D O I
10.1051/jphyscol:19868148
中图分类号
学科分类号
摘要
The Cu2xCr2xSn2-2xS4 spinel compounds have been investigated using EXAFS, especially as far as the structural features of monovalent copper excess are concerned, i.e. for 2x > 1. It has been shown that part of Cu is tetrahedrally surrounded (8a-sites) whereas the remaining part is triangularly coordinated in the vicinity of a face of the usually empty octahedral sites. In addition, the evidence for short Cu-Cu distances (2.35 angstrom) is given, in agreement with the octahedral- and tetrahedral- site arrangement.
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页码:247 / 250
页数:4
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