The rate of diffusion of Cl2 through a capillary filled with the fused halide was determined visually. The rate increased with the CuCl content. For 20%CuCl, the activation energy was 2.9kcal/mol.

A.P.Timchenko, A.V.Gorodyskii, N.A.Shvab: Ukrainski Khimicheski Zhurnal, 1977, 43[5], 451-4