›› Physical and chemical properties of Iridium

Atomic Number:77
Element Symbol:Ir
Element Name:Iridium
Atomic Weight:192.217
Group Number:9
Group Name:Precious metal or Platinum group metal
Period Number:6
Ground State Configuration:[Xe] 4f14 5d7 6s2
Ground State Level:4F9/2
Standard State:Solid
Bond Length:271.4
Atomic Radius Empirical:135
Atomic Radius Calculated:180
Covalent Radius Empirical:137
Electron Affinity:151.0
First Ionization Energy:880
Pauling Electronegativity:2.20
Allred Rochow Electronegativity:1.55
Density Of Solid:22650
Molar Volume:8.52
Velocity Of Sound:4825
Youngs Modulus:528
Rigidity Modulus:210
Bulk Modulus:320
Poissons Ratio:0.26
Mineral Hardness:6.5
Brinell Hardness:1670
Vickers Hardness:1760
Electrical Resistivity:4.7
Melting Point:2466
Boiling Point:4428
Superconduction Temperature:-273.04
Thermal Conductivity:150
Coefficient Of Linear Expansion:6.4
Enthalpy Of Fusion:26
Enthalpy Of Vaporization:560
Enthalpy Of Atmization:671
Most Common Oxidation Numbers:4,3
Color:Silvery white
Discovered By:Smithson Tennant, Antoine Fourcroy, Louis Vanquelin, Hippolyte Collet-Descotils
Discovered At:England, France
Discovered When:1803
Origin Of Name:From the Greek word iris meaning rainbow

Calculate the molecular weight of Iridium or molecular weight Ir.

Also see the full list of chemical elements and atomic weights.

››Compounds that contain Iridium

Iridium(II) Bromide  IrBr2
Iridium(III) Bromide  IrBr3
Iridium(IV) Bromide  IrBr4
Iridium(II) Chloride  IrCl2
Iridium(III) Chloride  IrCl3
Iridium(IV) Chloride  IrCl4
Iridium(III) Fluoride  IrF3
Iridium(IV) Fluoride  IrF4
Iridium(V) Fluoride  IrF5
Iridium(VI) Fluoride  IrF6
Iridium(II) Iodide  IrI2
Iridium(III) Iodide  IrI3
Iridium(IV) Iodide  IrI4
Iridium(IV) Oxide  IrO2
Iridium(II) Oxide Dihydrate  IrO2.2H2O
Iridium(IV) Sulfide  IrS2
Iridium(III) Selenide  IrSe2
Iridium(III) Telluride  IrTe3
Iridium(III) Oxide  Ir2O3
Iridium(III) Sulfide  Ir2S3