Niobium - ₄₁Nb: physical properties

Density properties

• Density of solid: 8570 kg m^‑3
• Molar volume: 10.83 cm³

Elastic properties

• Young's modulus: 105 GPa
• Rigidity modulus: 38 GPa
• Bulk modulus: 170 GPa
• Poisson's ratio: 0.40 (no units)

Hardnesses

• Mineral hardness: 6.0 (no units)
• Brinell hardness: 736 MN m^-2
• Vickers hardness: 1320 MN m^-2

Electrical properties

• Electrical resistivity: 15.2 × 10^‑8 Ω m; or mΩ cm

Heat and conduction

• Thermal conductivity: 54 W m^‑1 K^‑1
• Coefficient of linear thermal expansion: 7.3 × 10^‑6 K^‑1

Optical properties

The image above is a virtual representation of niobium 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: 3480 m s^‑1