Difference between revisions of "Iridium"
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| − | {{Element | name=Iridium | symbol=Ir | anumber=77 | amass=192.22 amu | state=Solid | class=Transition Metals | cstructure= | + | {{Element | name=Iridium | symbol=Ir | anumber=77 | amass=192.22 amu | state=Solid | class=Transition Metals | cstructure=Face-Centered Cubic| color=Silver | date=1803 | discname=Smithson Tennant | origname=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=Found in gravel deposits with [[platinum]], [[iridosmium]], and [[osmiridium]] ores. }} |
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| + | '''Iridium''' is an [[element]] in the [[transition metal]]s class of the [[periodic table of the elements|periodic table]]. It is hard and lustrous, and resists attack by acids. It is very dense (22.560). It has two stable isotopes. | ||
[[Category:Elements]] | [[Category:Elements]] | ||
Revision as of 19:57, November 15, 2008
| Iridium | |
|---|---|
| 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, iridosmium, and osmiridium ores. |
Iridium is an element in the transition metals class of the periodic table. It is hard and lustrous, and resists attack by acids. It is very dense (22.560). It has two stable isotopes.
