The diffusivity of 191Pt, 195mPt and 197Pt tracers in monocrystalline samples was determined by using serial sectioning techniques. It was found that the results could be described by:

D (cm2/s) = 1.9 x 100 exp[-56.1(kcal/mol)/RT]

at 1094 to 1232K. G.Neumann, M.Pfundstein, P.Reimers: Philosophical Magazine A, 1982, 45[3], 499-507