| Numéro |
J. Phys. Colloques
Volume 47, Numéro C8, Décembre 1986
EXAFS and Near Edge Structure IV
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|---|---|---|
| Page(s) | C8-719 - C8-723 | |
| DOI | https://doi.org/10.1051/jphyscol:19868135 | |
EXAFS and Near Edge Structure IV
J. Phys. Colloques 47 (1986) C8-719-C8-723
DOI: 10.1051/jphyscol:19868135
1 The Boeing C°., Seattle, WA 98124, U.S.A.
2 LOS Alamos National Laboratory, Los Alamos, NM 87546, U.S.A.
J. Phys. Colloques 47 (1986) C8-719-C8-723
DOI: 10.1051/jphyscol:19868135
DETERMINATION OF STRUCTURE AND VALENCE IN VANADIUM BRONZE BY X-RAY ABSORPTION SPECTROSCOPY
F. W. LYTLE1, R. B. GREEGOR1 et I. D. RAISTRICK21 The Boeing C°., Seattle, WA 98124, U.S.A.
2 LOS Alamos National Laboratory, Los Alamos, NM 87546, U.S.A.
Abstract
We used XANES to determine coordination geometry and charge state in a series of mixed valence vanadium bronzes, NaXV2O5 where x = 0.25, 0.40, and 0.75. Simple chemical arguments suggest that each additional positive charge added to the V205 lattice will switch one V5+ to V4+. Our results sugaest that this is generally true. The energy position and splitting of the V K-edge prepeak, 1s-to-3d, was a sensitive indicator of V valence(s). The intensity of the brepeak decreased as the first neighbor bonds increased in length.