Manganese

Manganese is a chemical element with the symbol Mn, atomic number 25, and relative atomic mass 54.9380, is a gray white, hard, brittle, and glossy transition metal. The relative density is 7.21g/cm ³ (a, 20 ℃). Melting point 1244 ℃, boiling point 2095 ℃. The resistivity is 185×10 Ω· m (25 ℃).

Manganese is a hard and brittle silver white metal with a cubic or tetragonal crystal system. The relative density is 7.21g/cm ³ (a, 20 ℃). Melting point 1244 ℃, boiling point 2095 ℃. The resistivity is 185×10 Ω· m (25 ℃). Manganese is a reactive metal that burns in oxygen, oxidizes on its surface in air, and can directly combine with halogens to form halides.

Manganese does not exist as a single element in nature, but manganese ore is common in the form of oxides, silicates, and carbonates. Manganese ore is mainly distributed in Australia, Brazil, Gabon, India, Russia, and South Africa. The manganese nodules on the Earth’s seafloor contain approximately 24% manganese. The reserves of manganese ore resources in Africa are 14 billion tons, accounting for 67% of the global reserves.China has abundant manganese ore resources, which are widely distributed and produced in 21 provinces (regions) across the country.