Manganese oxide is any of a variety of manganese oxides and hydroxides. This includes:
Manganese(II) oxide, MnOManganese(II,III) oxide, Mn3O4Manganese(III) oxide, Mn2O3Manganese dioxide, (manganese(IV) oxide), MnO2Manganese(VI) oxide, MnO3Manganese(VII) oxide, Mn2O7It may refer more specifically to the following manganese minerals:
BirnessiteHausmanniteManganiteManganositePsilomelanePyrolusiteManganese may also form mixed oxides with other metals such as Fe, Nb, Ta, ... :
Bixbyite, a manganese iron oxide mineralJacobsite, a manganese iron oxide mineralColumbite, also called niobite, niobite-tantalite and columbateTantalite, a mineral group close to columbiteColtan, a mixture of columbite and tantaliteGalaxite, a spinel mineralTodorokite, a rare complex hydrous manganese oxide mineral