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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
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D O I:
10.1051/jphyscol:19868148
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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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