Iridium - Wikipedia
WEBIridium 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 – Wikipedie
WEBIridium je prvek s druhou nejvyšší hustotou (hned po osmiu). Při stejném objemu je cca o 10 % těžší než např. uran, který se právě pro svoji hustotu používá ke zvýšení kinetické energie střely. Prvotní mezinárodní etalony délkové míry 1 m a hmotnosti 1 kg byly vyrobeny ze slitiny platiny s iridiem.
Iridium Satellite Communications | Your World. Our Network.
WEBBringing It Back to Earth. 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 …
Iridium - Element information, properties and uses | Periodic Table
WEBIridium 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.
IRIDIUM.CZ
WEBIRIDIUM.CZ. Komerční interiéryBytové interiéry. Interiéry, které dávají smysl již od roku 1992. Posloucháme přání zákazníka, které měníme v realitu za přispění našich znalostí a zkušeností. Hledáme nové cesty a netradiční řešení při optimálním využití nabídky trhu. Ctíme individuální přístup a plné ...
Iridium | Definition, Properties, & Uses | Britannica
WEBApr 11, 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.
Iridium | History, Uses, Facts, Physical & Chemical Characteristics
WEBIridium belongs to the platinum group of metals and is highly dense and resistant to corrosion. It was discovered in 1803. History and Discovery. Ancient South Americans and Ethiopians have used platinum along with iridium. Iridium was discovered as an impurity in platinum metal by Smithson Tennant in 1803.
Facts About Iridium | Live Science
WEBDec 2, 2016 · Iridium's principal use is to harden platinum by making a platinum alloy. It is also used to make devices needed for high temperatures and in electrical contacts. It is also used on some...
Iridium Facts - Periodic Table of the Elements - ThoughtCo
WEBJan 10, 2020 · 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. The metal is very hard and brittle and is the most corrosion-resistant metal known.
Iridium - Periodic Table
WEBIridium - Properties, history, name origin, facts, applications, isotopes, electronic configuation, crystal structure, hazards and more; Interactive periodic table of the chemical elements.
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