Nb
元素符号:Nb
中文名称:铌
英文名称:Niobium
原子序数:41
原子量:92.91
外围电子排布:4d4 5s1
核外电子排布:2,8,18,12,1
常见化合价:+2,+3,+5
密度:8.57
溶点:2468
沸点:4927
所属周期:5
所属族数:VB
原子半径:2.08
离子半径:0.64(+5)
共价半径:1.34
同位素及放射性:Nb-93
发现人:Charles Hatchet
发现时间:1801
发现地点:英格兰
名称由来:From Niobe; daughter of the mythical Greek king Tantalus.
元素描述:Shiny white, soft, ductile metal.
元素来源:Occurs in a mineral columbite. Formerly known as colombium (Cb). It is used in stainless steel alloys for nuclear reactors, jets and missiles.
元素用途:Used as an alloy with iron and nickel. It can be used in nuclear reactors and is known to be superconductive when alloyed with tin, aluminum or zirconium.