It was found that resistivity-derived data for S in-diffusion, at 700 to 850C, could be described by:

D (cm2/s) = 7.0 x 10-1 exp[-38.0(kcal/mol)/RT]

S.J.Wang, H.J.Grabke: Zeitschrift für Metallkunde, 1970, 61[8], 597-603