High pressure synthesis of ilmenite type MnCrO3 and its magnetic properties

MnCrO₃ was synthesized by reaction of MnO with CrO₂ at 50 kbars and 1200°C. MnCrO₃ is isomorphous with triclinic vanadate ilmenites CoVO₃(I), CuVO₃(I) and MnVO₃(I). Unit cell dimensions are $\text{a}\text{= 5.113 ± 0.009 (}\text{A}\text{?}\text{)}$, $\text{b}\text{= 5.385 ± 0.007(}\text{A}\text{?}\text{)}$, $\text{c}\text{= 4.991 ± 0.007(}\text{A}\text{?}\text{)}$, α = 89° 57′ ± 9′, β = 118°12′ ± 7′ and γ = 62°33′ ± 6′. Magnetic properties of MnCrO₃ were also studied. Temperature variation of magnetic susceptibility obey the Curie-Weiss law.