In Mg2+-substituted NdCrO3, single-phase perovskite compounds Nd(Cr1 - xMgx)O-3, where x=0 to 0.25, have been formed at low temperatures by decomposition of Nd(Cr1 - xMgx)O-4, which crystallize from amorphous materials prepared by the hydrazine method. Nd(Cr Mg-1 - x(x))O-3 powders consisting of submicrometer-size particles are highly sinterable; dense materials can be fabricated by sintering for 4 h at 1800 degreesC under atmospheric pressure. The relative densities, gain sizes, and electrical conductivities increase with increased Mg2+ content. Nd(Cr0.75Mg0.25)O-3 materials show an excellent electrical conductivity of 1.4 x 10(3) S m (-1) at 1000 degreesC.