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Manganese oxide is any of a variety of manganese oxides and hydroxides.Wells A.F. (1984) ''Structural inorganic chemistry'' 5th edition Oxford Science Publications, . These include *
Manganese(II) oxide Manganese(II) oxide is an inorganic compound with chemical formula MnO.Arno H. Reidies "Manganese Compounds" Ullmann's Encyclopedia of Chemical Technology 2007; Wiley-VCH, Weinheim. It forms green crystals. The compound is produced on a large s ...
, MnO *
Manganese(II,III) oxide Manganese(II,III) oxide is the chemical compound with formula Mn3O4. Manganese is present in two oxidation states +2 and +3 and the formula is sometimes written as MnO· Mn2O3. Mn3O4 is found in nature as the mineral hausmannite. Preparation Mn3O4 ...
, Mn3O4 * Manganese(III) oxide, Mn2O3 * Manganese dioxide, MnO2 * Manganese(VI) oxide, MnO3 *
Manganese(VII) oxide Manganese(VII) oxide (manganese heptoxide) is an inorganic compound with the formula Mn2O7. This volatile liquid is highly reactive. It is a dangerous oxidizer and was first described in 1860. It is the acid anhydride of permanganic acid. Prop ...
, Mn2O7 Other manganese oxides include Mn5O8, Mn7O12 and Mn7O13.


Minerals

It may refer more specifically to the following manganese minerals: *
Birnessite Birnessite (nominally MnO2.''n''H2O) is a hydrous manganese dioxide mineral with a chemical formula of Na0.7Ca0.3Mn7O14·2.8H2O. It is the main manganese mineral species at the Earth's surface, and commonly occurs as fine-grained, poorly crystall ...
*
Buserite Buserite is a hydrated layered Mn-oxide mineral with nominal chemical formula MnO2.''n''H2O. It was named after Swiss chemist professor W. Buser, who first identified it in 1952 in deep-sea manganese nodules. Buser named it 10 Å manganate becau ...
*
Hausmannite Hausmannite is a complex oxide of manganese containing both di- and tri-valent manganese. The formula can be represented as Mn2+Mn3+2O4. It belongs to the spinel group and forms tetragonal crystals. Hausmannite is a brown to black metallic miner ...
*
Manganite Manganite is a mineral composed of manganese oxide-hydroxide, MnO(OH), crystallizing in the monoclinic system (pseudo-orthorhombic). Crystals of manganite are prismatic and deeply striated parallel to their length; they are often grouped togethe ...
* Manganosite * Psilomelane * Pyrolusite Manganese may also form mixed oxides with other metals : * Bixbyite, a manganese iron oxide mineral * Jacobsite, a manganese iron oxide mineral * Columbite *
Tantalite The mineral group tantalite Fe,_manganese.html"_;"title="iron.html"_;"title="iron">Fe,_manganese">Mn)Tantalum">Ta2oxygen.html" ;"title="manganese">Mn)Tantalum.html" ;"title="iron">Fe,_manganese.html" ;"title="iron.html" ;"title="iron">Fe, mang ...
, a mineral group close to columbite * Coltan, a mixture of columbite and tantalite * Galaxite, a spinel mineral *
Todorokite Todorokite is a rare complex hydrous manganese oxide mineral with the chemical formula . It was named in 1934 for the type locality, the Todoroki mine, Hokkaido, Japan. It belongs to the prismatic class 2/m of the monoclinic crystal system, bu ...
, a rare complex hydrous manganese oxide mineral


References

{{Chemistry index Manganese compounds Manganese minerals Oxide minerals Transition metal oxides