The diffusivity of H in the hydride, Ni5LaH6, was found to be described by:

D (cm2/s) = 8.8 x 10-5 exp[-0.242(eV)/kT]

at temperatures of between 248 and 318K

E.Lebsanft, D.Richter, J.M.Töpler: Zeitschrift für Physikalische Chemie, 1979, 116, 175-83