Iridium

Iridium: physical properties

Temperatures

• Melting point: 2739 [or 2466 °C (4471 °F)] K
• Boiling point: 4701 [or 4428 °C (8002 °F)] K (liquid range: 1962  K
• Critical temperature: no data  K
• Superconduction temperature: 0.11 [or -273.04 °C (-459.47 °F)] K

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Expansion and conduction properties

• Thermal conductivity: 150  W m^-1 K^-1
• Coefficient of linear thermal expansion: 6.4  x 10^-6 K^-1

Bulk properties

• Density of solid: 22650  kg m^-3
• Molar volume: 8.52  cm³
• Velocity of sound: 4825  m s^-1

Elastic properties

• Youngs modulus: 528  GPa
• Rigidity modulus: 210  GPa
• Bulk modulus: 320  GPa
• Poissons ratio: 0.26  (no units)

Hardnesses

• Mineral hardness: 6.5  (no units)
• Brinell hardness: 1670  MN m^-2
• Vickers hardness: 1760  MN m^-2

Electrical properties

• Electrical resistivity: 4.7  10^-8 Ω m; or mΩ cm

Optical properties

The image above is a virtual representation of iridium metal calculated by Patrick Callet using the complex diectric function of the element only.

• Reflectivity: 78  %
• Refractive index: no data  (no units)

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Iridium	Iridium
Iridium	Iridium
Iridio	Iridio
Iridium	Irídio