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铱是6个铂族金属元素(铂Pt、铱Ir、锇Os、钯Pd、铑Rh、钌Ru)之一。1803年,英国化学家S·坦南特(Tennant)在分析自然铂的王水不溶物时,发现了两种新物质,一种其化合物(四氧化锇)有强挥发性,并有与氯气相似的气味,遂以希腊文osme(气味)命名为osmium(锇);另一种是化合物呈多变的颜色,以希腊文iris(虹)命名为iridium,那就是铱。1804年,坦南特在英国皇家学会举行的一次会上宣读了他的论文。
Iridium is one of six platinum group metal elements (platinum Pt, iridium Ir, osmium Os, palladium Pd, rhodium Rh, ruthenium Ru). In 1803, when Tennant, a British chemist, analyzed aqua regia of natural platinum, two new substances were discovered, one of which had a strong volatility (osmium tetroxide) A similar odor was named osmium (osmium) in the Greek word osme (odor); the other was a compound in a variable color, the Greek iris named iridium, which was iridium. In 1804, Tenant read his paper at a meeting of the Royal Society.