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XAFS Study of Fe K Edge in Al2O3-B2O3-Fe2O3-Na2O-SiO2 Glasses

  • S.V. Stefanovsky (a1) (a2), A.A. Shiryaev (a2), Y.V. Zubavichus (a3), K.M. Fox (a4) and J.C. Marra (a4)...

Abstract

Valence state and local environment of Fe in complex glasses related to the system Al2O3-B2O3-Fe2O3-Na2O-SiO2 were studied. In all the glasses, the major fraction of Fe exists as Fe3+ ions but a minor fraction of Fe2+ ions especially in the glass with the lowest K=[SiO2]/[B2O3] ratio was also present. Average Fe—O distance in the first shell is 1.80-1.85 Å and coordination number is 4-6. The intensity due to the second sphere is rather weak demonstrating homogeneous distribution of Fe ions in the glass.

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Keywords

XAFS Study of Fe K Edge in Al2O3-B2O3-Fe2O3-Na2O-SiO2 Glasses

  • S.V. Stefanovsky (a1) (a2), A.A. Shiryaev (a2), Y.V. Zubavichus (a3), K.M. Fox (a4) and J.C. Marra (a4)...

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