Super-ionic xAgI-(1-x)Ag2O•nMxOy glass systems, where MxOy was B2O3, P2O5 or MoO3, were investigated by means of infra-red reflectance spectroscopy in order to identify structural characteristics which were related to the high ionic conductivity. Spectral analysis showed that AgI affected the local order, and intermediate-range order, of the host matrix in a manner and to an extent which depended upon the Ag2O and AgI contents; as well as upon the nature of the glass-forming oxide. A study of the far-infrared profiles suggested that the Ag ions occupied 2 types of oxide site and one iodide site. The existence of mixed, oxy-iodide, sites was also suggested. The degree of organization of iodide sites into AgI-like micro-domains was found to increase with the AgI content, and to depend upon the nature of the oxyanion matrix.

E.I.Kamitsos, J.A.Kapoutsis, G.D.Chryssikos, J.M.Hutchinson, A.J.Pappin, M.D.Ingram, J.A.Duffy: Physics and Chemistry of Glasses, 1995, 36[3], 141-9