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In fact, iridium is the most corrosion-resistant metal known. It is not affected by high temperatures, acids, bases, or most other ... Iridium may be a key element in the puzzle of dinosaur extinction. Scientists search for iridium in the soil to track the impact of a giant meteor with the Earth 65 million years ago.
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www.chemistryexplained.com/elements/C-K/Iridium.html
www.chemistryexplained.com/elements/C-K/Iridium.html
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The name iridium is appropriate, for its salts are highly coloured. Iridium is white, similar to platinum, but with a slight yellowish cast. It is very hard and brittle, making it very hard to machine, form, or work. ... History: meaning of name; discovery; and history of the element...
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www.webelements.com/iridium/
www.webelements.com/iridium/
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He won the Nobel Prize in 1968 for the development of the hydrogen bubble chamber and the discovery of new resonance states. ... "If I had known the iridium work had been done earlier (by Barker and Anders in 1968) and the iridium was not useful for what I had in mind, I wouldn t have found the iridium spike, which we think...
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www.lbl.gov/Science-Articles/Archive/luis-alvarez-iridi...
www.lbl.gov/Science-Articles/Archive/luis-alvarez-iridium.html
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Iridium was brought into public discussion with the discovery of an iridium-rich layer in the strata of soil and rock which covers the entire planet. It is part of the evidence for an asteroid collision with the earth, widely associated with the extinction of the dinosaurs about 65 million years ago.
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hyperphysics.phy-astr.gsu.edu/HBASE/pertab/ir.html
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The Element Iridium - Basic Physical and Historical Information ... The Element Iridium; [Click for Isotope Data] ... Pure iridium is very brittle and is nearly impossible to machine. It is primarily used as a hardening agent for platinum. Platinum-iridium alloys are used to make crucibles and other high temperature...
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education.jlab.org/itselemental/ele077.html
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Iridium was discovered and named by a British scientist, Smithson Tennant. About 1800 he began an extended association with W. H. Wollaston in London for the purpose of improving the technology of the fabrication of platinum.
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nautilus.fis.uc.pt/st2.5/scenes-e/elem/e07710.html
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national enquirer, sky telescope, jupiter effect: Hi again Joe, Oh, sorry, guess I did misunderstand your question.... ... Well, I am aware of the discovery of Iridium by Alverez and the connection with the K-T extinction impact in the Yucatan peninsula some 62 million years ago.
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en.allexperts.com/q/Astronomy-1360/Galactic-Alignment-3...
en.allexperts.com/q/Astronomy-1360/Galactic-Alignment-3.htm
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Iridium - Wikipedia, the free encyclopedia
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Iridium (pronounced /ɨˈrɪdiəm/ , i- RID -ee-əm ) is the chemical element with atomic number 77, and is represented by the symbol Ir . A very hard, brittle, silvery-white transition me...
en.wikipedia.org/wiki/Iridium
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Definition of the Iridium Element; A very hard and brittle, exceptionally corrosion-resistant, whitish-yellow metallic element occurring in platinum ores and used principally to ... Facts about the History and the Discovery of the Iridium Element; Iridium was discovered by Smithson Tennant in London, England in 1803...
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www.periodic-table.org.uk/element-iridium.htm
www.periodic-table.org.uk/element-iridium.htm
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