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&fist; 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.

Man`ga*ne"sian (?), a. [Cf. F.
manganésien.] (Chem.) Manganic.
[R.]

Man`ga*ne"sic (?), a. [Cf. F.
manganésique.] (Chem.) Manganic.
[Obs.]

Man`ga*ne"sious (?), a. (Chem.)
Manganous.

Man`ga*ne"si*um (?), n.


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