There are two most common alloys of osmium, iridosmium and osmiridium. Let’s find out who discovered this element. Osmium will react at 200° C with air or oxygen to form OsO4. 628 Hofstadter Road, Suite 6Newport News, VA 23606, Thomas Jefferson National Accelerator Facility is managed by, Jefferson Science Associates, LLC for the U.S. Department of Energy. [39] Discovery of the new elements was documented in a letter to the Royal Society on June 21, 1804. Tennant is best known for his discovery of the elements iridium and osmium. Your email address will not be published. Part II: Osmium and iridium – events surrounding their discoveries", "On Two Metals, Found in the Black Powder Remaining after the Solution of Platina", "2006 Minerals Yearbook: Platinum-Group Metals", "The composition of the continental crust", 10.1002/0471238961.1612012019052513.a01.pub2, "Commodity Report: Platinum-Group Metals", "Platinum Metals: A Survey of Productive Resources to industrial Uses", "Osmium: An Appraisal of Environmental Exposure", "The Use of Hydrogen Fluoride in the Development of Latent Fingerprints Found on Glass Surfaces", "The Solubility of Hydrogen in the Platinum Metals under High Pressure", "Osmium(vi) complexes as a new class of potential anti-cancer agents", "Anti-colorectal cancer activity of an organometallic osmium arene azopyridine complex", "The contrasting chemical reactivity of potent isoelectronic iminopyridine and azopyridine osmium(II) arene anticancer complexes", "Second LDEF post-retrieval symposium interim results of experiment A0034", "Toxic Manifestations of Osmium Tetroxide",, Short description is different from Wikidata, Articles with dead external links from June 2019, Articles with failed verification from September 2020, Articles needing additional references from April 2019, All articles needing additional references, Wikipedia articles incorporating a citation from the 1911 Encyclopaedia Britannica with Wikisource reference, Creative Commons Attribution-ShareAlike License. Osmium was discovered in 1803 by Smithson Tennant in the dark coloured residue left when crude platinum is dissolved by aqua regia (a mixture of hydrochloric and nitric acid). Platinum reached Europe as platina ("small silver"), first encountered in the late 17th century in silver mines around the Chocó Department, in Colombia. [43], Osmium is found in nature as an uncombined element or in natural alloys; especially the iridium–osmium alloys, osmiridium (osmium rich), and iridosmium (iridium rich). Iridium is one of the nine least abundant stable elements in Earth's crust, having an average mass fraction of 0.001 ppm in crustal rock.


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