| Numéro |
J. Phys. Colloques
Volume 47, Numéro C8, Décembre 1986
EXAFS and Near Edge Structure IV
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|---|---|---|
| Page(s) | C8-1097 - C8-1100 | |
| DOI | https://doi.org/10.1051/jphyscol:19868215 | |
EXAFS and Near Edge Structure IV
J. Phys. Colloques 47 (1986) C8-1097-C8-1100
DOI: 10.1051/jphyscol:19868215
1 Chemistry Department, Brookhaven National Laboratory, Upton. NY 11973, U.S.A.
2 Chemistry Department, The Chinese University of Hong Kong, Shatin, N.T., Hong-Kong
J. Phys. Colloques 47 (1986) C8-1097-C8-1100
DOI: 10.1051/jphyscol:19868215
L-EDGE XANES STUDIES OF CHARGE REDISTRIBUTION UPON COMPOUND FORMATION IN GOLD AND NICKEL METALLIC COMPOUNDS
T.K. SHAM1, 21 Chemistry Department, Brookhaven National Laboratory, Upton. NY 11973, U.S.A.
2 Chemistry Department, The Chinese University of Hong Kong, Shatin, N.T., Hong-Kong
Abstract
L-edge XANES of a series of gold (AuAl2, AuGa2 and Au2Ag) and nickel (NiSb, Ni0.64 Fe0.36 NiAl, and NiAl ) intermetallic compounds have been measured. It is found that the LIII.II edges of AuAl2 and AuGa2 exhibit very intense whiteline indicating a significant depletion of d character at the Au site of these compounds. This observation is interpreted in terms of a mechanism in which s-d interplay determines the overall charge redistribution. In the case of Ni compounds, the effect of s-d interplay is found to be less dramatic.