Definition of Iridium. Meaning of Iridium. Synonyms of Iridium

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Definition of Iridium

Iridium
Iridium I*rid"i*um, n. [NL., fr. L. iris, iridis, the rainbow. So called from the iridescence of some of its solutions. See Iris.] (Chem.) A rare metallic element, of the same group as platinum, which it much resembles, being silver-white, but harder, and brittle, and indifferent to most corrosive agents. With the exception of osmium, it is the heaviest substance known, its specific gravity being 22.4. Symbol Ir. Atomic weight 192.5. Note: Iridium usually occurs as a native alloy with osmium (iridosmine or osmiridium), which may occur alone or with platinum. Iridium, as an alloy with platinum, is used in bushing the vents of heavy ordnance. It is also used for the points of gold pens, and in a finely powdered condition (iridium black), for painting porcelain black.

Meaning of Iridium from 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...
- The Iridium satellite constellation provides L band voice and data information coverage to satellite phones, satellite messenger communication devices...
- Iridium Communications Inc. (formerly Iridium Satellite LLC) is a publicly traded American company headquartered in McLean, Virginia, United States. Iridium...
- There are two natural isotopes of iridium (77Ir), and 37 radioisotopes, the most stable radioisotope being 192Ir with a half-life of 73.83 days, and many...
- Look up Iridium or iridium in Wiktionary, the free dictionary. Iridium is a chemical element with symbol Ir and atomic number 77. Iridium may also refer...
- Iridium-192 (symbol 192Ir) is a radioactive isotope of iridium, with a half-life of 73.827 days. It decays by emitting beta (β) particles and gamma (γ)...
- than positive magnitudes, i.e. the scale is reverse logarithmic . The Iridium constellation was one of the first anthropogenic sources of near-space...
- Iridium trifluoride is a binary chemical compound of iridium and fluorine with the chemical formula IrF 3. Reduction of iridium hexafluoride by metallic...
- Iridium tetrabromide is a binary inorganic chemical compound of iridium and bromine with the chemical formula IrBr4. This is a salt of iridium metal and...
- Cyclooctadiene iridium methoxide dimer is an organoiridium compound with the formula Ir2(OCH3)2(C8H12)2, where C8H12 is the diene 1,5-cyclooctadiene....