Environment of Ni, Co and Zn in low alkali borate glasses: information from EXAFS and XANES spectra. - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Non-Crystalline Solids Année : 2002

Environment of Ni, Co and Zn in low alkali borate glasses: information from EXAFS and XANES spectra.

Résumé

XANES spectroscopy confirms that transition elements such as nickel, cobalt and zinc are octahedrally co-ordinated in low-alkali borate glasses, a co-ordination state which is unusual in most oxide glasses. EXAFS spectroscopy indicates that, despite their diluted character, transition elements are inhomogeneously distributed, with a medium range order extending up to 6 Å with multiple scattering features characteristic of the presence of collinear cations. This peculiar structure is attributed to the presence of rigid units in these low-alkali borate glasses. The presence of these ordered domains in 0.1Li2O–0.9B2O3 glasses with NiO contents ranging from 0.5 to 2 wt% shows their independence relative to the concentration of the transition element.

Dates et versions

hal-00085393 , version 1 (12-07-2006)

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Laurence Galoisy, Laurent Cormier, Georges Calas, Valérie Briois. Environment of Ni, Co and Zn in low alkali borate glasses: information from EXAFS and XANES spectra.. Journal of Non-Crystalline Solids, 2002, 293-295, pp.105-111. ⟨10.1016/S0022-3093(01)00659-7⟩. ⟨hal-00085393⟩
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