Manganese oxide
Encyclopedia
Manganese oxide is a generic term used to describe a variety of manganese oxides and hydroxides. It may refer to:
It may refer more specifically to the following manganese minerals:
- Manganese(II) oxideManganese(II) oxideManganese oxide is the inorganic compound with formula MnO. MnO is a basic oxide that is insoluble in water but dissolves in acids, forming manganese salts.-Preparation and occurrence:...
, MnO - Manganese(II,III) oxideManganese(II,III) oxideManganese 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 - Manganese(III) oxideManganese(III) oxideManganese oxide is the chemical compound of formula Mn2O3.-Preparation and chemistry:Heating MnO2 in air at below 800°C α-Mn2O3 is produced . γ-Mn2O3 can be produced by oxidation followed by dehydration of manganese hydroxide...
, Mn2O3 - Manganese dioxide, (manganese(IV) oxide), MnO2
- Manganese(VII) oxideManganese(VII) oxideManganese oxide is an inorganic compound with the formula Mn2O7. This volatile liquid is highly reactive and more often discussed than intentionally prepared. It is a dangerous oxidizer and was first described in 1860.- Properties :...
, Mn2O7
It may refer more specifically to the following manganese minerals:
- BirnessiteBirnessiteBirnessite 2O4 · 1.5 H2O is an oxide mineral of manganese along with calcium, potassium and sodium. It has a dark brown to black color with a submetallic luster. It is also very soft, with a Mohs hardness of 1.5...
- HausmanniteHausmanniteHausmannite 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...
- ManganositeManganositeManganosite is a rare mineral composed of manganese 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 Furnace, New Jersey. It also occurs in Japan, Kyrgyzstan and...
- PsilomelanePsilomelanePsilomelane, also known as black hematite, is a group name for hard black manganese oxides such as hollandite and romanechite. Psilomelane consists of hydrous manganese oxide with variable amounts of barium and potassium.-Formula:...
- PyrolusitePyrolusitePyrolusite is a mineral consisting essentially of manganese dioxide and is important as an ore of manganese. It is a black, amorphous appearing mineral, often with a granular, fibrous or columnar structure, sometimes forming reniform crusts. It has a metallic luster, a black or bluish-black...