Manganese(III) oxide

Manganese(III) oxide is a chemical compound with the formula Mn2O3. Manganese(III) oxide is a chemical compound with the formula Mn2O3. Heating MnO2 in air at below 800 °C produces α-Mn2O3 (higher temperatures produce Mn3O4). γ-Mn2O3 can be produced by oxidation followed by dehydration of manganese(II) hydroxide. Many preparations of nano-crystalline Mn2O3 have been reported, for example syntheses involving oxidation of MnII salts or reduction of MnO2.