The diffusivities in the hydride/deuteride were determined at temperatures of between 208 and 338K, under gas pressures of between 10bar and 10kbar. In the case of H diffusion, it was found that the results could be described by the expression:

D (cm2/s) = 0.00113 exp[-27.1(kJ/mol)/RT]

while those for D could be described by the expression:

D (cm2/s) = 0.00105 exp[-25.9(kJ/mol)/RT]

S.Majorowski, B.Baranowski: Journal of the Physics and Chemistry of Solids, 1982, 43[12], 1119-27