Manganese oxide
Manganese oxide is any of a variety of manganese oxides and hydroxides. This includes:
Manganese(II) oxide, MnO
Manganese(II,III) oxide, Mn3O4
Manganese(III) oxide, Mn2O3
Manganese dioxide, (manganese(IV) oxide), MnO2
Manganese(VI) oxide, MnO3
Manganese(VII) oxide, Mn2O7
It may refer more specifically to the following manganese minerals:
Birnessite
Hausmannite
Manganite
Manganosite
Psilomelane
Pyrolusite
Manganese may also form mixed oxides with other metals such as Fe, Nb, Ta, ... :
Bixbyite, a manganese iron oxide mineral
Jacobsite, a manganese iron oxide mineral
Columbite, also called niobite, niobite-tantalite and columbate
Tantalite, a mineral group close to columbite
Coltan, a mixture of columbite and tantalite
Galaxite, a spinel mineral
Todorokite, a rare complex hydrous manganese oxide mineral
References