Definition of Black oxide of manganese. Meaning of Black oxide of manganese. Synonyms of Black oxide of manganese

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Definition of Black oxide of manganese

Black oxide of manganese
Manganese Man`ga*nese", n. [F. mangan[`e]se, It. manganese, sasso magnesio; prob. corrupted from L. magnes, because of its resemblance to the magnet. See Magnet, and cf. Magnesia.] (Chem.) An element obtained by reduction of its oxide, as a hard, grayish white metal, fusible with difficulty, but easily oxidized. Its ores occur abundantly in nature as the minerals pyrolusite, manganite, etc. Symbol Mn. Atomic weight 54.8. Note: An alloy of manganese with iron (called ferromanganese) is used to increase the density and hardness of steel. Black oxide of manganese, Manganese dioxide or peroxide, or Black manganese (Chem.), a heavy black powder MnO2, occurring native as the mineral pyrolusite, and valuable as a strong oxidizer; -- called also familiarly manganese. It colors glass violet, and is used as a decolorizer to remove the green tint of impure glass. Manganese bronze, an alloy made by adding from one to two per cent of manganese to the copper and zinc used in brass.

Meaning of Black oxide of manganese from wikipedia

- can incorporate a variety of atoms (as well as water molecules) in the "tunnels" or "channels" between the manganese oxide octahedra. There is considerable...
- Manganese(III) oxide is a chemical compound with the formula Mn2O3. Heating MnO2 in air at below 800 °C produces α-Mn2O3 (higher temperatures produce Mn3O4)...
- resistance to wear. Manganese oxide is used as an oxidising agent, as a rubber additive, in gl**** making, fertilisers, and ceramics. Manganese sulfate can be...
- 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...
- for hard black manganese oxides including hollandite and romanechite. Psilomelane consists of hydrous manganese oxide with variable amounts of barium and...
- a mineral consisting essentially of manganese dioxide (MnO2) and is important as an ore of manganese. It is a black, amorphous appearing mineral, often...
- natural brown or reddish-brown earth pigment that contains iron oxide and manganese oxide. Umber is darker than the other similar earth pigments, ochre...
- result of volcanic activity. In Montana moss agate the red color is the result of iron oxide and the black color is the result of manganese oxide. The gemstone...
- differentiate it from magnesia negra, a black mineral containing what is now known as manganese. While "magnesium oxide" normally refers to MgO, magnesium...
- (naturally formed iron oxides) Raw umber (PBr7): a natural clay pigment consisting of iron oxide, manganese oxide and aluminum oxide: Fe2O3 + MnO2 + nH2O...