| Numéro |
J. Phys. Colloques
Volume 47, Numéro C8, Décembre 1986
EXAFS and Near Edge Structure IV
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|
|---|---|---|
| Page(s) | C8-691 - C8-696 | |
| DOI | https://doi.org/10.1051/jphyscol:19868130 | |
EXAFS and Near Edge Structure IV
J. Phys. Colloques 47 (1986) C8-691-C8-696
DOI: 10.1051/jphyscol:19868130
1 Dipartimento di Matematica e Fisica, Università di Camerino, I-62032 Camerino, Italy
2 Laboratori Nazionali di Frascati, I-00044 Frascati, Italy
3 Dipartimento di Fisica, Università di Roma "La Sapienza", I-00185 Roma, Italy
4 Department of Thermology, University of Zaragoza, Zaragoza, Spain
J. Phys. Colloques 47 (1986) C8-691-C8-696
DOI: 10.1051/jphyscol:19868130
VANADIUM SITE STRUCTURE IN V2O5 GEL BY POLARIZED EXAFS AND XANES
S. STIZZA1, M. BENFATTO1, 2, A. BIANCONI3, J. GARCIA3, 2, 4, G. MANCINI1 et C.R. NATOLI21 Dipartimento di Matematica e Fisica, Università di Camerino, I-62032 Camerino, Italy
2 Laboratori Nazionali di Frascati, I-00044 Frascati, Italy
3 Dipartimento di Fisica, Università di Roma "La Sapienza", I-00185 Roma, Italy
4 Department of Thermology, University of Zaragoza, Zaragoza, Spain
Abstract
The local structure at the V site is investigated by polarized X-ray absorption spectroscopy in vanadium pentoxide gel V2O51.6H2O. Polarized absorption spectra allows to separate experimentally the contribution of neighbour atoms in different directions. EXAFS analysis were performed using spherical wave aproximation (SWA). When polarization vector E is in the direction of the axis of the pyramid, EXAFS analysis gives only the short double bond lenght at 1.58 Å, but XANES indicates the aditionalpresence of the oxygen at 2.7Å.