Mn acrylic cube 25x25x25 mm. Articul: ac25
1 500,00 ₽
Mn keychain 20x30 mm. Articul: pt25
Mn keychain 20x40 mm. Articul: 25577
Trinket. Manganese. Articul: 2587120420
Pendant. Manganese. Articul: 2588120320
Manganese (Mn), 99.8%, 5 gr. - in a glass jar. Articul: 2552120617
Mn. Chemical button 18 mm. Articul: but25
Серебряное звено (925) с вставкой из марганца. Articul: Icon25
2 500,00 ₽
Atomic number 25
Atomic mass 54,938
Density, kg / m? 7430
melting, ° С 1244
Manganese is a hard, brittle metal with a silvery white color. Along with iron and its alloys, it belongs to ferrous metals.
Manganese minerals have been known for a long time. The ancient Roman naturalist Pliny mentions a black stone that was used to discolor a liquid glass mass; it was about the mineral pyrolusite. Since ancient times, pyrolusite has served as a filler material in the production of iron in Georgia. For a long time, pyrolusite was called black magnesia and was considered a type of magnetic iron ore (magnetite). In 1774, K. Scheele showed that this is a compound of an unknown metal, and another Swedish scientist, Yu. Gan, strongly heating a mixture of pyrolusite with coal, and obtained manganese contaminated with carbon. The name Manganese is traditionally derived from the German Manganerz - manganese ore.