manganese

[ mang-guh-nees, -neez ]

Phonetic (Standard)IPA

noun

, Chemistry.

a hard, brittle, grayish-white, metallic element, an oxide of which, MnO 2 manganese dioxide, is a valuable oxidizing agent: used chiefly as an alloying agent in steel to give it toughness. : Mn; : 54.938; : 25; : 7.2 at 20°C.

manganese

/ ˈmæŋɡəˌniːz /

a brittle greyish-white metallic element that exists in four allotropic forms, occurring principally in pyrolusite and rhodonite: used in making steel and ferromagnetic alloys. Symbol: Mn; atomic no: 25; atomic wt: 54.93805; valency: 1, 2, 3, 4, 6, or 7; relative density: 7.21–7.44; melting pt: 1246±3°C; boiling pt: 2062°C

manganese

/ măng′gə-nēz′ /

A grayish-white, hard, brittle metallic element that occurs in several different minerals and in nodules on the ocean floor. It is used to increase the hardness and strength of steel and other important alloys. Atomic number 25; atomic weight 54.9380; melting point 1,244°C; boiling point 1,962°C; specific gravity 7.21 to 7.44; valence 1, 2, 3, 4, 6, 7.
See Periodic Table

1670–80; < French manganèse < Italian manganese, alteration of Medieval Latin magnesia magnesia

C17: via French from Italian manganese, probably altered form of Medieval Latin magnesia

The fact that the Rio Grande rise also harbors traces of iron and manganese was not lost on the minerals industry.

And it put forward sensitive and intelligent antenn as it sought its food thirty miles away down the coast—manganese.

The moment they showed signs of coming his way, Edward Garden was after richer returns than manganese would yield.

When peroxide of manganese has been used, the manganese is also precipitated as oxide.

If the amount of manganese is more than double that of iron, the separation of the latter will take a much longer time.

When the amount of manganese is small, the separation of the two elements takes place very rapidly, and the results are accurate.

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