Mo K-edge XAFS in Na2O-K2O-SiO2 glasses

N. Sawaguchi, T. Yokokawa, K. Kawamura

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15 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)13-18
Number of pages6
JournalPhysics and Chemistry of Glasses
Issue number1
Publication statusPublished - Dec 1 1996

ASJC Scopus subject areas

  • Ceramics and Composites
  • Physical and Theoretical Chemistry


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