![]() The primary use of pure iridium is in crucibles for procedures that must be carried out under extremely high-temperatures. The limited options for techniques to work with iridium significantly limit applications of the pure metal, but the one of the few that exist drives much of the demand for the element. While iridium metal’s resistance to change is extremely desirable in some applications, the tradeoff is that solid iridium is too hard and brittle to work or machine and melts at too high a temperature to make traditional casting practical. It is the most corrosion-resistant of all metals, is extremely hard, and has an extremely high melting temperature-2466 degrees Celsius. While osmium was named for the pungent odor produced by its oxide, iridium was notable for the many vibrant colors of its salts, leading Tennant to derive its name from Iris, the Greek goddess of rainbows.Īll of the platinum group metals are known for being hard, fairly non-reactive, and performing well under high-temperatures, but iridium stands out in these regards even within this small family. An English chemist named Smithson Tennant was the first to experiment extensively on large quantities of this residue, eventually convincing himself and announcing to the world in 1804 that it contained two new elements: osmium and iridium. When platina is dissolved in aqua regia, a mixture of strong acids, a dark insoluble residue is left behind. ![]() Platinum first came to Europe in the form of platina, grey metallic crumbs that were unusable to metalworkers in their native form. American Elements: The Materials Science Company™ | Certified bulk & lab quantity manufacturer of metals, chemicals, nanoparticles & other advanced materials
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