High pressure synthesis of ilmenite type MnCrO 3 and its magnetic properties

Abstract

MnCrO 3 was synthesized by reaction of MnO with CrO 2 at 50 kbars and 1200°C. MnCrO 3 is isomorphous with triclinic vanadate ilmenites CoVO 3(I), CuVO 3(I) and MnVO 3(I). Unit cell dimensions are a = 5.113 ± 0.009 ( A ̊ ) , b = 5.385 ± 0.007( A ̊ ) , c = 4.991 ± 0.007( A ̊ ) , α = 89° 57′ ± 9′, β = 118°12′ ± 7′ and γ = 62°33′ ± 6′. Magnetic properties of MnCrO 3 were also studied. Temperature variation of magnetic susceptibility obey the Curie-Weiss law.