Hafnium - ₇₂Hf: physical properties

Density properties

• Density of solid: 13310 kg m^‑3
• Molar volume: 13.44 cm³

Elastic properties

• Young's modulus: 78 GPa
• Rigidity modulus: 30 GPa
• Bulk modulus: 110 GPa
• Poisson's ratio: 0.37 (no units)

Hardnesses

• Mineral hardness: 5.5 (no units)
• Brinell hardness: 1700 MN m^-2
• Vickers hardness: 1760 MN m^-2

Electrical properties

• Electrical resistivity: 34 × 10^‑8 Ω m; or mΩ cm

Heat and conduction

• Thermal conductivity: 23 W m^‑1 K^‑1
• Coefficient of linear thermal expansion: 5.9 × 10^‑6 K^‑1

Optical properties

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

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

Acoustic properties

• Velocity of sound: 3010 m s^‑1