Iridium is a chemical element; it has symbol Ir and atomic number 77. A very hard, brittle, silvery-white transition metal of the platinum group, it is considered the second-densest naturally occurring metal (after osmium) with a density of 22.56 g/cm3 (0.815 lb/cu in) as defined by experimental X-ray crystallography.
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Iridium is a hard, silvery metal. It is almost as unreactive as gold. It has a very high density and melting point.
Apr 11, 2024 · A precious, silver-white metal, iridium is hard and brittle, but it becomes ductile and can be worked at a white heat, from 1,200° to 1,500° C ( ...
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Iridium is a rare and expensive corrosion-resistant metal. Discover why iridium is used in the manufacture of aircraft, spark plugs, and tech devices.