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Manganese is a silver-white metal. Along with iron and its alloys, it belongs to ferrous metals. Five allotropic modifications of manganese are known - four with a cubic and one with a tetragonal crystal lattice. Manganese is found in the organisms of all plants and animals, although its content is usually very low, on the order of thousandths of a percent, it has a significant impact on vital activity, that is, it is a trace element.