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Ir   -   Iridium (77/192.22)

Material List
  • Naturally occurring isotopes: 193 191
  • Density: 22.42 (290.15K) g/cm3
  • Melting point: 2410 oC
  • Boiling point: 4130 oC
  • Latent heat of fusion: 137.2 J/g
  • Specific heat: 0.131 J/g/K (at room temp.)
  • Coefficient of lineal thermal expansion: 6.60E-06 cm/cm/K (at room temp.)
  • Thermal conductivity: 1.47E+00 W/cm/K (at room temp.)
  • Electrical resistivity: 4.71E-06 hm-cm (at room temp.)
  • lonization potential (1st): 9.1 eV
  • Electronic work function Φ: 5.27
  • Oxidation potentials: Ir + 6Cl- → IrCl6 3- + 3e = -0.77 V
  • Chemical valence: 2 3 4 6
  • Electrochemical equivalents: 1.793 g/amp-hr
  • lonic radius: 0.625 angstrom
  • Valence electron potential: 92.2 -eV
  • Principal quantum number: 6
  • Principal electron shells: K L M N O P
  • Electronic configuration: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d7 6s2
  • Valence electrons: 5d7 6s2
  • Crystal form: FCC
  • Half life:
  • Cross section σ: 425 ± 15 barns
  • Vapor pressure: 1.47E+01 Pa (at melting point)