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.
Vanadium Site Structure in V2O5 Gel by Polarized EXAFS and XANES
STIZZA, Sergio;MANCINI, Giorgio;
1986-01-01
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.File in questo prodotto:
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