Self-diffusion of O ions in solid PbO was determined at 500 to 650C. The method used was measurement of the rate of isotopic exchange between the solid oxides and oxygen gas enriched with 18O. The exchange rates were determined using mass spectrometry. The diffusion coefficients were described by the Arrhenius equation:

D(cm2/s) = 5.39 x 10-5 exp[-22400/RT]

B.A.Thompson, R.L.Strong: Journal of Physical Chemistry, 1963, 67[3], 594-7