XANES Study of the Gallium and Iron Environments in Phosphate Based Glasses

S. Poisson; P. Berthet

doi:doi:10.1051/jp4:19972162

Numéro		J. Phys. IV France Volume 7, Numéro C2, Avril 1997 Proceedings of the 9th International Conference on X-Ray Absorption Fine Structure


Page(s)		C2-1139 - C2-1140
DOI		https://doi.org/10.1051/jp4:19972162

Proceedings of the 9th International Conference on X-Ray Absorption Fine Structure

J. Phys. IV France 7 (1997) C2-1139-C2-1140
DOI: 10.1051/jp4:19972162

XANES Study of the Gallium and Iron Environments in Phosphate Based Glasses

S. Poisson and P. Berthet

Laboratoire de Chimie des Solides, URA 446 du CNRS, Bât. 414, Université Paris-Sud, 91405 Orsay cedex, France

Abstract
Glasses prepared in the Na₂O-M₂O₃-P₂O₅ systems (M=Ga, Fe) have been studied by X-ray absorption spectroscopy at the Ga and Fe K-edges. When these atoms are found in 6-fold coordination, striking similarities are found between their XANES spectra and those of some crystalline diphosphates. From the simulation of the XANES spectrum of crystalline NaFeP₂O₇ using the FEFF6 code, an ordering of the phosphorus atoms linked to the FeO₆ octahedra is evidenced in the glasses.