i.rid.i.um
n.Symbol Ir (名词)符号 Ir
A very hard and brittle, exceptionally corrosion-resistant, whitish-yellow metallic element occurring in platinum ores and used principally to harden platinum and in high-temperature materials, electrical contacts, and wear-resistant bearings. Atomic number 77; atomic weight 92.2; melting point 2,40=C; boiling point 4,30=C; specific gravity 22.42 (at 7=C); valence 3, 4.See table at element
铱:一种坚硬而脆的,极抗腐蚀的黄白色金属,存在于铂矿中,主要用来硬化铂和制造耐高温材料,电器接头和耐磨轴承。原子序数77;原子重92.2;熔点2,40=C;沸点4,30=C;比重22.42(在7=C时);化合价3,4参见 element
来源:
Latin oris orid- [rainbow (from the colors produced by dissolving it in hydrochloric acid)] * see irido-
拉丁语 oris orid- [彩虹(将铱溶解于盐酸时会产生彩虹般的颜色)] *参见 irido-
-ium
-ium