The diffusion of H in the α-phase was studied at 300 to 700C. The results for iodide and sponge grades could be described by:

iodide:     D (cm2/s) = 6.94 x 10-3 exp[-10.58(kcal/mol)/RT]

sponge:     D (cm2/s) = 7.82 x 10-3 exp[-10.93(kcal/mol)/RT]

J.J.Kearns: Journal of Nuclear Materials, 1972, 43[3], 330-8