TeO2-WO3 glasses:: Infrared, XPS and XANES structural characterizations

Transparent (1-x)TeO2-xWO(3) glasses with 0 less than or equal to x less than or equal to 0.325 mol were synthesized by the fast quenching technique. Several complementary techniques as infrared, X-ray photoelectron and X-ray absorption spectroscopies were used to approach the structure of these tungsten oxide-tellurite glasses. Special attention was paid to the oxidation state and the coordination state of tungsten atoms. The structural results show that (1-x)TeO2-xWO(3) glasses present characteristic tellurium environments which vary with their chemical composition while tungsten ions always adopt an octahedral configuration. (C) 2002 Elsevier Science (USA).