New glasses in the xPbI2-(100-x)(2Ag2O-IV2O5) system, where x ranged from 5 to 20, were characterized by using X-ray diffraction and differential scanning calorimetry. The conductivity of the glasses increased with increasing PbI2 content, and attained a value of 1.4 x 10-3S/cm at 300K, for an x-value of 20. Spectroscopic data indicated that the oxyanion network was unaffected by the addition of PbI2. The transport number of Ag+, as determined by using the emf method, was found to be 0.99. The overall results indicated the formation of so-called AgI clusters, due to a coordinate exchange between Pb2+ and Ag+, which contributed to high Ag+-ion conductivity.

R.S.Kumar, K.Hariharan: Solid State Ionics, 1997, 104[34], 227-36