Mn
元素符号:Mn
中文名称:锰
英文名称:Manganese
原子序数:25
原子量:54.94
外围电子排布:3d5 4s2
核外电子排布:2,8,13,2
常见化合价:+1,+2,+3,+4,+6,+7
密度:7.43
溶点:1244
沸点:2061
所属周期:4
所属族数:VIIB
原子半径:1.79
离子半径:0.67(+2)
共价半径:1.17
同位素及放射性:Mn-55
发现人:Johann Gahn
发现时间:1774
发现地点:瑞典
名称由来:Latin: magnes (magnet); Italian: manganese.
元素描述:Hard, brittle, gray-white metal with a pinkish tinge. Rusts like iron in moist air.
元素来源:Most abundant ores are pyrolusite (MnO2), psilomelane [(Ba,H2O)2Mn5O10] and rhodochrosite (MnCO3). Pure metal produced by mixing MnO2 with powered Al and ignited in a furnace.
元素用途:Used in steel, batteries and ceramics. The steel in railroad tracks can contain as much as 1.2% manganese. It is crucial to the effectiveness of vitamin B1.