The diffusive behavior of H was studied at 1547 to 1726C. The results could be described by:

D (cm2/s) = 3.2 x 10-3 exp[-3.3(kcal/mol)/RT]

N.M.El-Tayeb, N.A.D.Parlee: Transactions of the AIME, 1967, 239[9], 1345-51