Samples of general formulae (AgI)4−2x(CdI2)xKI and (AgI)4−x(CuI)xKI, x = 0–0.4, were prepared and studied by conductivity measurements, powder X-ray diffraction and differential scanning calorimetry techniques. Room temperature X-ray diffraction revealed the presence of the orthorhombic K2AgI3 as the major component in the system. Differential scanning calorimetry traces showed endothermic peaks in the temperature range of 309–330K, depending on the sample composition. These were attributed to the solid state reaction between AgI and K2AgI3 to form the cubic KAg4I5. Impedance spectra showed the prominence of electrode/electrolyte interface effect which was explained in terms of the high rate of ion migration. Ionic conductivity enhances with the increase of Cd2+ content, while Cu+ contained samples showed a decrease in conductivity with increasing Cu+ ratio though the ionic conductivity remained higher than that of the pure one.

Electrical Conductivity of AgI–CdI2–KI and AgI–CuI–KI Ionic Conducting Systems. M.Hassan, A.N.Al-hakimi, Rafiuddin: Arabian Journal of Chemistry, 2011, 4[1], 45-9