Iridium
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Iridium | |
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Properties | |
Atomic symbol | Ir |
Atomic number | 77 |
Classification | Transition Metals |
Atomic mass | 192.22 amu |
Other Information | |
Date of discovery | 1803 |
Name of discoverer | Smithson Tennant |
Name origin | From the Latin iridis, meaning rainbow. |
Uses | Used in conjunction with osmium to tip gold pen points, to make crucibles and other high-temperature containers. Also used to make alloys for standard weights and measures, as well as heat-resistant alloys. In addition, used in cancer irradiation, hypodermic needles, helicopter spark plugs and as hardening agent for platinum. |
Obtained from | Found in gravel deposits with platinum and osmiridium ores. |