Tantalum - ₇₃Ta: physical properties

Density properties

• Density of solid: 16650 kg m^‑3
• Molar volume: 10.85 cm³

Elastic properties

• Young's modulus: 186 GPa
• Rigidity modulus: 69 GPa
• Bulk modulus: 200 GPa
• Poisson's ratio: 0.34 (no units)

Hardnesses

• Mineral hardness: 6.5 (no units)
• Brinell hardness: 800 MN m^-2
• Vickers hardness: 873 MN m^-2

Electrical properties

• Electrical resistivity: 13.5 × 10^‑8 Ω m; or mΩ cm

Heat and conduction

• Thermal conductivity: 57 W m^‑1 K^‑1
• Coefficient of linear thermal expansion: 6.3 × 10^‑6 K^‑1

Optical properties

The image above is a virtual representation of tantalum 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: 3400 m s^‑1