Measurements were made of the diffusivity of D in single crystals of Ni at temperatures ranging from 490 to 690K. The results were expressed in terms of an isotope effect (table 100).

Y.Ebisuzaki, W.J.Kass, M.O'Keeffe: Journal of Chemical Physics, 1967, 46[4], 1373-7

Table 100

Ratio of H and D Diffusivities in Ni