| Symbol |
Ir |
|
| Atomic Number |
77 |
Relative Atomic Mass
12C = 12.0000 |
192.217 |
Atomic Radius
pm |
136 |
First Ionisation Energy
kJ mol-1 |
880 |
| Electronegativity |
2.20 |
Density
kg m-3 |
22560 [290 K]
20000 [m.p.] |
Molar Volume
cm3 |
8.57 |
Thermal Conductivity
W m-1 K-1 |
147 [300 K] |
Melting Point
K |
2683 |
Boiling Point
K |
4403 |
| Number of Isotopes |
40 |
Ground State Electron
Configuration |
[Xe]4f145d76s2 |
| Term Symbol |
4F9/2 |
| Discovery |
Discovered by S. Tennant (London, England) in 1803 |
| Name Derived From |
Latin iris meaning 'rainbow' |
Name in Other
Languages |
 Croatian | Iridij |
 Danish | iridium |
 Dutch | iridium |
 Finnish | iridium |
 French | iridium |
 German | Iridium |
 Italian | iridio |
 Norwegian | irdium |
 Portuguese | irídio |
 Spanish | iridio |
 Swedish | iridium |
| Peter van der Krogt's Element Multidict - element name translations in over 48 langauges |
