The diffusion of I through sintered tablets of the α-phase was measured by using radioactive 131I. The diffusion coefficient was found to range from 2 x 10-7 to 6 x 10-7 cm2/s at 150 to 300C.

V.I.Morozov, V.E.Prokopets, R.P.Sobolev, F.F.Trush: Elektrokhimiya, 1977, 13[3], 375-8