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M  ›  manganese
M  ›  manganese
1828 Definition

MAN'GANESE, n. A metal of a dusky white, or whitish gray color, very hard and difficult to fuse. It never occurs as a natural product in a metallic state. The substance usually so called is an oxyd of manganese, but not pure.

1913 Definition
Manganese (manganese)
n.(?)
Man`ga*nese"
[F. manganèse, It. manganese, sasso magnesio; prob. corrupted from L. magnes, because of its resemblance to the magnet. See Magnet, and cf. Magnesia.] (Chem.)
  1. 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.

    * 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.


1828 dictionary
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