The incorporation of Ni into the Fe sub-lattice of LaFeO3 was found to result in an increase in O non-stoichiometry and electrical conductivity. The activation energy for conduction in LaFe1-xNixO3, where x was between 0.2 and 0.5, decreased from 23.9 to 6.6kJ/mol as a function of x.Oxygen Permeability of La(Fe,Ni)O3 Solid Solutions. V.V.Kharton, A.P.Viskup, E.N.Naumovich, V.N.Tikhonovich: Materials Research Bulletin, 1999, 34[8], 1311-7