Iridium - ₇₇Ir: physical properties

Density properties

• Density of solid: 22650 kg m^‑3
• Molar volume: 8.52 cm³

Elastic properties

• Young's modulus: 528 GPa
• Rigidity modulus: 210 GPa
• Bulk modulus: 320 GPa
• Poisson's 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

Heat and conduction

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

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)

Acoustic properties

• Velocity of sound: 4825 m s^‑1