Manganese Manganese is a chemical element; it has Symbol (chemistry), symbol Mn and atomic number 25. It is a hard, brittle, silvery metal, often found in minerals in combination with iron. Manganese was first isolated in the 1770s. It is a transition m ...

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, MnO * Manganese(II,III) oxide, Mn₃O₄ *

Manganese(III) oxide Manganese(III) oxide is a chemical compound with the formula Mn2O3. It occurs in nature as the mineral bixbyite (recently changed to bixbyite-(Mn)IMA 21-H: Redefinition of bixbyite and definition of bixbyite-(Fe) and bixbyite-(Mn). CNMNC Newslett ...

, Mn₂O₃ *

Manganese dioxide Manganese dioxide is the inorganic compound with the formula . This blackish or brown solid occurs naturally as the mineral pyrolusite, which is the main ore of manganese and a component of manganese nodules. The principal use for is for dry-cel ...

, 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, * Buserite, * Hausmannite, * Manganite, MnO(OH) *

Manganosite Manganosite is a rare mineral composed of manganese(II) oxide MnO. It was first described in 1817 for an occurrence in the Harz Mountains, Saxony-Anhalt, Germany. It has also been reported from Langban and Nordmark, Sweden and at Franklin Furn ...

, MnO *

Psilomelane Psilomelane is a group name for hard black manganese oxides including hollandite and romanechite. Psilomelane consists of hydrous manganese oxide with variable amounts of barium and potassium. Psilomelane is erroneously, and uncommonly, known as ...

, , or * Pyrolusite, Manganese may also form mixed oxides with other metals: * Bixbyite, , a manganese(III) iron(III) oxide mineral *

Jacobsite Jacobsite is a manganese iron oxide mineral. It is in the spinel group and forms a solid solution series with magnetite. The chemical formula is (Mn,Mg)Fe2O4 or with Redox, oxidation states and substitutions: (Mn2+,Fe2+,Mg)(Fe3+,Mn3+)2O4.

, , a manganese(II) iron(III) oxide mineral * Columbite, , a niobate of iron(II) and manganese(II) * Tantalite, , a tantalum(V) mineral group close to that of columbite * Coltan, a mixture of columbite and tantalite series *

Galaxite Galaxite, also known as 'mangan-spinel' is an Cubic crystal system, isometric mineral belonging to the spinel group of oxide minerals, oxides with the ideal chemical formula . It is sometimes used as a gemstone.Tables of Gemstone Identification By ...

, , a spinel mineral * Todorokite, , a rare complex hydrous manganese oxide mineral

References

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