The diffusivities of H and D at 110 to 165K could be described by:

D:      D (cm2/s) = 8.8 x 10-4 exp[-0.395(eV)/kT]

H:      D (cm2/s) = 1.1 x 10-4 exp[-0.350(eV)/kT]

B.Hohler, H.Kronmüller: Philosophical Magazine A, 1981, 43[5], 1189-204