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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/cm 3 (0.815 lb/cu in) as defined by experimental X-ray crystallography.
Iridium is the most corrosion-resistant material known. It is used in special alloys and forms an alloy with osmium, which is used for pen tips and compass bearings. It was used in making the standard metre bar, which is an alloy of 90% platinum and 10% iridium.
Jun 8, 2024 · Iridium, chemical element, one of the platinum metals of Groups 8–10 (VIIIb), Periods 5 and 6, of the periodic table. It is very dense and rare and is used in platinum alloys. A precious, silver-white metal, iridium is hard and brittle, but it becomes ductile and can be worked at a white heat.
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Dec 2, 2016 · Iridium is the most corrosion-resistant element on the Periodic Table of Elements. It also has the highest density of all the elements. Because it resists corrosion, it is used to set...
Dec 27, 2023 · Iridium is a chemical element that has the atomic number 77 and is classed as a transition metal. Iridium is solid at room temperature. The name Iridium is said to come from the Greek word...
Iridium is a whitish silver transition metal. It is brittle solid at standard temperature and pressure. It is a significantly dense metal and is considered as the 2 nd densest element (22.56 g/cm 3 ). Iridium is considered as the most corrosion-resistant metal and does not react with water or oxygen even at high temperatures [3].
Jan 10, 2020 · Iridium Facts. Chemical & Physical Properties of Iridium. Iridium has a melting point of 2410°C, a boiling point of 4130°C, a specific gravity of 22.42 (17°C), and valence of 3 or 4. A member of the platinum family, iridium is white like platinum, but with a slight yellowish cast.
May 29, 2018 · Iridium is the densest of all elements and its metal is lustrous, silvery, and very hard. The metal has the face-centered cubic crystal structure. Iridium has two stable isotopes: 191 Ir (37.3%) and 193 Ir (62.7%).
Iridium is a rare, hard, lustrous, brittle, very dense platinum-like metal. Chemically it is very unreactive. It is the most corrosion-resistant metal known and it resists attack by any acid. Iridium is attacked by molten salts such as sodium chloride (NaCl) and sodium cyanide (NaCN).
