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Марганец

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Брелок. Марганец. Trinket. Manganese. Articul: 2587120420
550,00 ₽
Кубик 25х25х25 мм. Марганец. Mn acrylic cube 25x25x25 mm. Articul: ac25
1 500,00 ₽
Кулон. Марганец. Pendant. Manganese. Articul: 2588120320
770,00 ₽
Марганец (Mn), 99,8%, 5 гр. – в стеклянной баночке. Manganese (Mn), 99.8%, 5 gr. - in a glass jar. Articul: 2552120617
230,00 ₽
Пуговица 18 мм. Марганец. Mn. Chemical button 18 mm. Articul: but25
340,00 ₽
Марганец

 
Atomic number       25
Atomic mass       54,938
Density, kg / m?     7430
Temperature
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.

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