The conductivity of solid solutions, Cu1+xI1-xSx, having x-values of up to 0.5, was determined at temperatures of between 54 and 307C. It was found that the conductivity at 25C increased from 10-7S/cm for CuI to 10-3S/cm for Cu1.4I0.6S0.4. It then decreased to10-4 S/cm for Cu3SI. The variations in conductivity were directly related to the activation energy. The latter decreased to a minimum value of 2.5kcal/mol in the case of Cu1.4I0.6S0.4.

M.Tachez, R.Mercier, J.P.Malugani: Solid State Ionics, 1984, 14[3], 175-80