Glasses of the form, (1-x)[yAg2S,(1-y)GeS2]-xAgI, where x ranged from 0 to 0.375 and y ranged from 0 to 0.5, were investigated by using infra-red reflectance and Raman spectroscopy. The results for binary glasses indicated that the addition of Ag2S to GeS2 glass led to depolymerization of the thiogermanate network via the creation of terminal Ge-S- bonds. The AgI was also found to affect the network structure and this was expressed by disproportionation reactions. Interactions between Ag+ ions and their sites were also investigated and were considered with regard to the high ionic conductivity of these glasses. Broad-range conductivity spectra were also obtained by combining dielectric and far-infrared conductivity data.

E.I.Kamitsos, J.A.Kapoutsis, G.D.Chryssikos, G.Taillades, A.Pradel, M.Ribes: Journal of Solid State Chemistry, 1994, 112[2], 255-61