Manganese oxide

Manganese oxide is any of a variety of manganese oxides and hydroxides. These include


 * Manganese(II) oxide, MnO
 * Manganese(II,III) oxide, Mn3O4
 * Manganese(III) oxide, Mn2O3
 * Manganese dioxide, MnO2
 * Manganese(VI) oxide, MnO3
 * Manganese(VII) oxide, Mn2O7

Other manganese oxides include Mn5O8, Mn7O12 and Mn7O13.

Minerals
It may refer more specifically to the following manganese minerals:


 * Birnessite, (Na,Ca)0.5(Mn^{IV},Mn^{III})2O4 · 1.5 H2O
 * Buserite, MnO2*nH2O
 * Hausmannite, Mn^{II}Mn^{III}2O4
 * Manganite, Mn$III$O(OH)
 * Manganosite, Mn$II$O
 * Psilomelane, Ba(Mn^{II})(Mn^{IV})8O16(OH)4, or (Ba,H2O)2Mn5O10
 * Pyrolusite, Mn^{IV}O2

Manganese may also form mixed oxides with other metals :


 * Bixbyite, (Fe^{III},Mn^{III})2O3, a manganese(III) iron(III) oxide mineral
 * Jacobsite, Mn^{II}Fe^{III}2O4, a manganese(II) iron(III) oxide mineral
 * Columbite, (Fe^{II},Mn^{II})Nb2O6, a niobate of iron(II) and manganese(II)
 * Tantalite, (Fe^{II},Mn^{II})Ta2O6, a tantalum(V) mineral group close to that of columbite
 * Coltan, a mixture of columbite and tantalite series
 * Galaxite, Mn^{II}Al2O4, a spinel mineral
 * Todorokite,, a rare complex hydrous manganese oxide mineral