Definitions for: Manganese


[n] a hard brittle gray polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals



Webster (1913) Definition: 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.

Synonyms: atomic number 25, Mn

See Also: hausmannite, manganite, metal, metallic element, psilomelane, pyrolusite, rhodochrosite

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