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manganese
[ mang-guh-nees, -neez ]
noun
- 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
/ ˈ³¾Ã¦Å‹É¡É™ËŒ²Ô¾±Ë³ú /
noun
- 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
/ ³¾Äƒ²Ô²µâ€²²µÉ™-²Ôŧ³ú′ /
- 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
˜yÐÄvlog History and Origins
Origin of manganese1
˜yÐÄvlog History and Origins
Origin of manganese1
Example Sentences
Minerals found on the deep seabed including manganese, nickel, cobalt, gold and silver are all considered important materials for the green energy transition.
In 2022, SecDev, a geopolitical risk consultancy based in Canada, conducted an evaluation, which established that Russia had occupied 63% of Ukrainian coal mines, and half of its manganese, caesium, tantalum and rare earth deposits.
South Africa exports a variety of minerals to the US, including platinum, iron and manganese.
Packed full of cobalt, nickel and manganese, these ancient formations are now valuable: the metals go into batteries that power modern life, from electric cars to mobile phones.
Nickel, cobalt, and manganese enter the solution, where they are bound into stable complexes by the citric acid anions.
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