Coefficients of Cu+ diffusion in the , , and  phases (table 2) were measured by using an  in situ  tracer technique. It was found that diffusion in the  and  phases obeyed an Arrhenius law within the measured temperature ranges, and the activation energies were estimated to be 1.21 and 0.324eV, respectively. A comparison of the diffusion coefficients which were measured by using the  in situ  tracer diffusion technique, with diffusion coefficients which were deduced from conductivity data, suggested that a non charge-carrying diffusion mechanism was operating in copper halides.

J.E.Jørgensen, J.X.M.Z.Johansson, K.Sköld: Physical Review B, 1995, 52[2], 1004-8

Table 2

Diffusivity of Cu+ in Various Phases of CuBr