The impurity diffusion of 99Mo at 1200 to 1490K was measured by using a serial sectioning technique. The diffusivities (table 103) could be summarized by the Arrhenius relationship:

D (m2/s) = 1.68 x 10-8 exp[-142.6(kJ/mol)/RT]

R.V.Patil, G.P.Tiwari, B.D.Sharma: Metal Science, 1980, 14[11], 525-8