The diffusivity of O was deduced from the amount of O which accumulated or left a Pd plate during times shorter than those required for equilibrium. The results could be described by:

D (cm2/s) = 2.9 x 10-4 exp[-122(kJ/mol)/RT]

D.Wang, T.B.Flanagan: Scripta Materialia, 2005, 52[7], 599-601