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Iridium (Ir): Fun Facts and Information About the Element


What is the symbol? Ir
What is the atomic number? 77
What is the atomic weight? 192.217
What is the melting point in Celsius? 2410
What is the boiling point in Celsius? 4527
What is the density (g/cm3)? 22.4
What year was it discovered? 1803
Who discovered the element? Smithson Tennant
What group is the element in? 9
What is the electron configuration? [Xe] 4f14 5d7 6s2
What is the ionization energy? 8.967
What element category is it in? Transition Elements

Where is Iridium Found?

Iridium occurs uncombined in nature with platinum and other metals of this family in alluvial deposits. It is recovered as a by-product from the nickel mining industry.

What is Iridium Used For?

Although its principal use is as a hardening agent for platinum, iridium is also used to make crucibles and devices requiring high temperatures. It is also used for electrical contacts.