manganese

American  

[mang-guh-nees, -neez] / ˈmæŋ gəˌnis, -ˌniz /

noun

Chemistry.

1. a hard, brittle, grayish-white, metallic element, an oxide of which, MnO 2 manganese dioxide, 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.

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manganese British  

/ ˈmæŋɡəˌniːz /

noun

1. 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

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manganese Scientific  

/ măng′gə-nēz′ /

1. 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.

2. See Periodic Table

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Etymology

Origin of manganese

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

Example Sentences

The team tested this idea by combining a compound made of manganese, cobalt, and germanium with another made of manganese, cobalt, and arsenic.

From Science Daily

The strong performance of the optimized catalyst was traced to a cooperative interaction among gold, manganese, and copper ions.

From Science Daily

In particular, the study reshapes the understanding of how cobalt and manganese influence mechanical failure inside batteries.

From Science Daily

In the United States, this category includes minerals such as cobalt, nickel, manganese, lithium, tellurium, germanium, and many others.

From Science Daily

The deposits are scattered across the seabed in the form of small rocks known as nodules, akin to black golf balls filled with cobalt, copper and manganese, as well as some rare earths.

From The Wall Street Journal