In Ca2+-substituted SmCrO3, single-phase perovskite (Sm1-xCax) CrO3, where x = 0 to 0.27, have been formed at low temperatures by a citric acid processing. (Sm1-xCax) CrO3 powders consisting of submicrometer-size particles are sinterable; dense materials can be fabricated by sintering for 2 h at 1700 degreesC under atmospheric pressure. The relative densities, grain sizes, and electrical conductivities increase with increased Ca2+ content. (Sm0.73Ca0.27) CrO3 materials show an excellent electrical conductivity of 2.6 x 10(3) S . m(-1) at 1000 degreesC. (C) 2003 Kluwer Academic Publishers.