论文信息 - Coordination of Ti in TiO2SiO2 glass by X-ray absorption spectroscopy

Coordination of Ti in TiO2SiO2 glass by X-ray absorption spectroscopy

Abstract Evidence from both the extended X-ray absorption fine structure (EXAFS) and near-edge regions of the Ti K-edge X-ray absorption spectrum for TiO2SiO2 glasses has been examined to determine the coordination geometry of the Ti4+ ion. It is concluded that this geometry is primarily a four-fold coordination, with a small fraction of the Ti4+ ions having six-fold coordination and a longer TiO bond length. The ratio of six-fold to four-fold coordination is seen to increase with increased TiO2 content in the glass.

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