The diffusion of H was studied, by using a volumetric method, at temperatures ranging from 1550 to 1750C. The activation energy for diffusion was equal to 5.6kcal/g-atom at 1550 to 1650C and equal to 8.9kcal/g-atom at 1650 to1750C.

G.S.Ershov, A.A.Kasatkin: Izvestiya Akademii Nauk SSSR, Met., 1977, 1, 86-8