The diffusive behavior of 60Co in 5N-purity material was studied at 422 to 654C. The results could be described by:

D (cm2/s) = 4.64 x 102 exp[-41.74(kcal/mol)/RT]

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