Measurements were made of Cl2 diffusion in crystals which were doped with OH- ions. The diffusion front was detected by observing the blue coloration which was due to electron irradiation or the yellow fluorescence which was due to O2- ions. Solution of the relevant reaction-diffusion equation permitted the evaluation of the diffusion coefficient and of the Henry constant of Cl2. The diffusion results could be described by:

D(cm2/s) = 5.8 x 10-1exp[-1.61(eV)/kT]

The temperature dependence of the Henry constant indicated that the dissolution of Cl2 molecules at the surface was an exothermic reaction.

S.Ezure, T.Ikeda: Journal of the Physical Society of Japan, 1993, 62[9], 3150-6