The impurity diffusion of 88Y in CoO was measured in air by using the tracer-sectioning technique. The results, at 1001 to 1501C, could be described by:

D (cm2/s) = 3.30 x 10-4 exp[-28.89(kcal/mol)]

K.Hoshino, N.L.Peterson: Journal of Physics and Chemistry of Solids, 1984, 45[8-9], 963-72