The diffusive behavior of 99Mo was studied. The results could be described by:

900-1100C:     D (cm2/s) = 2.82 x 10-4 exp[-33.2(kcal/g-atom)/RT]

1100-1560C:     D (cm2/s) = 2.4 x 10-1 exp[-51.3(kcal/g-atom)/RT]

L.V.Pavlinov: Fizika Metallov i Metallovedenie, 1967, 24[2], 272-7