The diffusive behavior of 51Cr in 5N-purity material was studied at 586 to 620C. The results could be described by:

D (cm2/s) = 5.0 x 104 exp[-58.0(kcal/mol)/RT]

N.L.Peterson, S.J.Rothman: Physical Review B, 1970, 1[8], 3264-73