It was found that the data for samples containing 0.01 to 0.9%S, at 1130 to 1400C, could be described by:

D (cm2/s) = 3.43 x 10-3 exp[-6.89(kcal/mol)/RT]

J.Gerlach, F.Heisterkamp, H.G.Kleist, K.Mager: Metall, 1966, 20, 1272-8