Iridium - Wikipedia
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 Satellite Communications | Your World. Our Network.
Iridium is a global satellite communications company, providing access to voice and data services anywhere on Earth. With its constellation of satellites, Iridium’s network connects people and devices in the world’s most remote places — and close to home.
Iridium | Definition, Properties, & Uses | Britannica
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.
What Is Iridium And Is It More Expensive Than Gold?
2023年12月27日 · 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 - Element information, properties and uses | Periodic Table
Iridium is a hard, silvery metal. It is almost as unreactive as gold. It has a very high density and melting point. 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.
Iridium | History, Uses, Facts, Physical & Chemical Characteristics
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].
Iridium Communications - Wikipedia
Iridium Communications Inc. (formerly Iridium Satellite LLC) is a publicly traded American company headquartered in McLean, Virginia, United States. Iridium operates the Iridium satellite constellation, a system of 80 satellites: 66 are active satellites and the remaining fourteen function as in-orbit spares. [2]
Iridium Facts, Symbol, Discovery, Properties, Uses - Chemistry …
Iridium (pronounced as i-RID-ee-em) is a hard and brittle metal represented by the chemical symbol Ir. It is the least reactive element, belonging to the platinum family. It has 34 isotopes with mass numbers ranging from 165 to 198 of which only Ir-191 and Ir-193 exist naturally with a stable half-life [1, 2] .
Iridium | Ir (Element) - PubChem
Iridium is a chemical element with symbol Ir and atomic number 77. Classified as a transition metal, Iridium is a solid at room temperature. [Xe]6s 2 4f 14 5d 7. J.C. Slater, J Chem Phys, 1964, 41 (10), 3199-3205. DOI:10.1063/1.1725697.
Iridium Facts – Ir or Atomic Number 77 - Science Notes and Projects
2024年9月7日 · Iridium is a dense, hard, and corrosion-resistant metal belonging to the platinum group metals (PGMs). It has the element symbol Ir and atomic number 77. Iridium is one of the rarest elements on Earth. Its remarkable resistance to heat and chemical attack makes it valuable in various high-temperature and corrosive applications.