The conductivity of AgI-xSbI3-(0.5−x)Sb2S3 and AgI-xPbI2-(0.5−x)Sb2S3 glassy systems at a constant Ag concentration was investigated. It was found that Ag+-ion transport was closely related to the heavy-metal iodide content. The activation energy for conduction decreased from 0.38 to 0.28eV, and the room-temperature conductivity increased by a factor of 100 with increasing x-value. A structural model which was based upon available neutron diffraction, extended X-ray absorption fine-structure spectroscopic and 129I-Mössbauer spectroscopic data was proposed in order to explain the observations.

Superionic AgI–MIn–Sb2S3 Glasses (M = Pb, Sb) - Conduction Pathways Associated with Additional Metal Iodide. C.Renard, G.Coquet, E.Bychkov: Solid State Ionics, 2002, 154-155, 749-57