The average linear thermal expansion coefficient (TEC) of perovskite-type Sr 0 . 7 Ce 0 . 3 MnO 3 - δ , calculated from dilatometric data at 300-1100 K in air, is (11.9+/-0.2)x10 - 6 K - 1 , compatible with that of stabilized zirconia. The high electronic conductivity, 230-270 S/cm at 773-1273 K, and the moderate thermal expansion suggest possible application of Ce-doped strontium manganite as solid oxide fuel cell (SOFC) cathode material. The oxygen permeation fluxes through dense Sr 0 . 7 Ce 0 . 3 MnO 3 - δ membranes at 1273-1173 K were found to linearly increase with the oxygen chemical potential gradient in the range of permeate-side oxygen partial pressures from 21 kPa down to 2x10 - 9 Pa, indicating a relatively high stability of this phase. However, the oxygen permeability of Sr 0 . 7 Ce 0 . 3 MnO 3 - δ , limited by both bulk ionic conductivity and surface exchange at the membrane/gas boundaries, is higher than that of La 0 . 7 Sr 0 . 3 MnO 3 - δ , but still considerably lower if compared to La(Sr)Fe(Co)O 3 - δ perovskites.