Manganese (Manganese), chemical chrome washing machine element, Mn element symbol, atomic number 25, elemental is a kind of gray, hard brittle, lustrous transition metal. Pure metal manganese metal is a little soft than iron, manganese containing a small amount of impurity firm and crisp, moisture will oxidation. Manganese exists widely in nature, 0.25% manganese content in the soil, tea, wheat, and manganese content in the shell fruit more. Exposed to manganese homework with gravel, mining, electric welding, production of dry cells, dyestuff industry, etc. In 1774, gann separation manganese metal. Ingmar bergman named it for manganese (mn). Manganese available aluminothermy reduction gold CIP machine soft manganese ore. The earliest use of manganese can be traced back to the Stone Age. As early as 17000 years ago, manganese oxide) (soft manganese ore is upper paleolithic people as a pigment used in cave paintings and then in the spartans in ancient Greece used are also found in the arms of the manganese. The ancient egyptians and Romans used manganese to glass discoloration or staining.
Although the soft manganese ore was very early for people to use, however, until the 18th century 70 s, western chemists are still considered soft manganese ore containing tin, zinc and cobalt and other minerals. In the late 18th century, the Swedish chemist T.O. ingmar bergman studied pyrolusite, think it is a kind of new metal oxide, and tried to isolate the metal, but without success. Swedish chemist schere also no soft manganese ore from metal, then turned to his friend, David bergman's assistant - gann. In 1774, gann used purified schere soft manganese ore powder and charcoal Carbon in Pulp heating in an hour to get the buttons in the crucible of manganese metal pieces, ingmar bergman named it for manganese.