The diffusive behavior of 60Co in 4N-purity material was studied at 920 to 1600C. The results could be described by:

D (cm2/s) = 3.26 x 10-3 exp[-21.82(kcal/mol)/RT]

G.V.Kidson, G.J.Young: Philosophical Magazine, 1969, 20, 1047-56