Various compositions, between 10 and 90mol%ZnI2, were studied by using differential scanning calorimetry, X-ray diffraction and conductivity techniques at temperatures of between 25 and 350C. Mixtures which contained more than 40mol%CuI were solid solutions at room temperature, whereas disproportionation occurred in the case of materials which contained between 10 and 30mol%CuI. The conductivity of mixtures which contained more than 60mol%CuI changed from mixed to ionic at about 150C. This corresponded to a transition which was detected by using scanning differential calorimetry. The conductivities were higher than those of pure CuI. The highest conductivity was equal to 0.0018S/cm at 250C, for a composition which contained 20mol%ZnI2.

M.G.Alexander, B.Riley: Materials Research Bulletin, 1984, 19[11], 1527-34