The XAFS spectra of the Mo K-edge were investigated regarding molybdenum ions in sodium potassium silicate glasses. In all the measured glasses the molybdenum ions are considered to be in the 6+ oxidation state. We evaluated the Mo-O correlation and concluded that Mo6+ ion forms the MoO42- tetrahedron. The Mo-O distance is approximately 0.177 nm. This configuration is stable in the investigated composition range. The results indicate that the MoO42- tetrahedra are located outside the Si-O network anions. These MoO42- characteristics were discussed with the acid-base concept of the oxide glasses.
|Number of pages||6|
|Journal||Physics and Chemistry of Glasses|
|Publication status||Published - Dec 1 1996|
ASJC Scopus subject areas
- Ceramics and Composites
- Physical and Theoretical Chemistry