In order to clarify the diffusion of oxide-ion vacancies in this perovskite-type oxide, the tracer diffusion coefficient of oxide ions in La1-xSrxCoO3 (x = 0.1) single crystals (table 117) was found by using an 18O/16O tracer gas-phase analysis method. The correlation factor for a vacancy diffusion mechanism in a perovskite-type anion sub-lattice was calculated to be 0.69. Using this value and the non-stoichiometric data, the diffusion coefficient of the oxide ion vacancies was estimated (table 118). The diffusivity of oxide ions in the perovskite-type oxide was comparable to that in fluorite-type oxides.

T.Ishigaki, S.Yamauchi, K.Kishio, J.Mizusaki, K.Fueki: Journal of Solid State Chemistry, 1988, 73[1], 179-87