Abstract
Raman scattering measurements are reported for different glasses containing silver halides. The high frequency (Δ v > 250 cm -1) study implies that the interactions between the phosphate network and the halide solutes are very weak. Area measurements of the two low-frequency bands (<250 cm -1) have shown that: (i) the very low frequency band (∼60 cm -1) is only correlated to all Ag + oscillations; (ii) the higher band shifts from 115 cm -1 (AgI) to 135 cm -1 (AgBr) and to 190 cm -1 (AgCl) and its integrated intensity is in linear relation to the AgX concentration. The mode has been assigned to symmetric vibrations involving both Ag + and X - ions line in αAgI. A local cluster model of tetrahedral (AgX) n species has been proposed for each glass.
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