Metal ion sites in oxide glasses Relation to glass basicity and ion transport

Abstract A simple relationship between the normalized ion motion frequency in the far infrared and the optical basicity was established for all alkali borate glass systems, suggesting that far infrared spectroscopy can be used as a reliable technique for measuring optical basicity. Comparison between basicity values obtained from far infrared frequencies and those measured by ultraviolet spectroscopy, using Tl + and Pb 2+ probe ions electrolyzed into borate glasses, indicates that the mobile alkali ions occupy sites of high basicity.