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Iridium (Kelsey Taylor)

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Iridium (Kelsey Taylor)

  1. 1. Iridium Kelsey Taylor CHE: 120-010Element Project
  2. 2. Basic InformationSymbol: IrAtomic mass: 192.22 amuTransition metalAtomic number: 77
  3. 3. History of IridiumDiscovered in 1803 by Smithson Tennant (English; Yorkshire, England)It was found in the residue left behind by platinum when it dissolved in a mixture of hydrochloric acid and nitric acid.The term Iridium comes from the Latin term “iris” (rainbow) because many of the salts found within Iridium were brightly colored.
  4. 4. Smithson Tennant
  5. 5. Properties of IrIridium is a solid at room temperature.Color: whiteBoiling point: 4703 K (4430˚C)Melting point: 2720 K (2447˚C)Density: 22.56 g/cm³ (at 293 K)The most common isotope of Iridium is 193Ir and the most stable are 193Ir and 191Ir
  6. 6. Uses of IrIridium is mainly used in platinum alloys as a hardening agent.It is also used in making crucibles and making equipment that is used at high temperatures, heavy-duty electrical contacts, and in the tips of pens.Radioactive isotopes are used in cancer treatment in radiation therapy.
  7. 7. Availability of IrIridium is found with platinum and osmium in alluvial deposits in many alloysIt is also recovered as a by-product in the nickel mining industryCost: $2300 for 100g in bulk
  8. 8. Resourceshttp://www.chemicool.com/elements/iridiu m.htmlhttp://www.chemicalelements.com/element s/ir.htmlhttp://www.facts-about.org.uk/science- element-iridium.htm

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