Terbium: physical properties
Mechanical properties
Density properties
Density of solid: 8219 kg m‑3
Molar volume: 19.30 cm3
Elastic properties
Young's modulus: 56 GPa
Rigidity modulus: 22 GPa
Bulk modulus: 38.7 GPa
Poisson's ratio: 0.26 (no units)
Hardnesses
Mineral hardness: (no data) (no units)
Brinell hardness: 677 MN m-2
Vickers hardness: 863 MN m-2
Electrical properties
Electrical resistivity: 115 × 10‑8 Ω m; or mΩ cm
Heat and conduction
Thermal conductivity: 11 W m‑1 K‑1
Coefficient of linear thermal expansion: 10.3 × 10‑6 K‑1
Optical properties
Reflectivity: (no data) %
Refractive index: (no data) (no units)
Acoustic properties
Velocity of sound: 2620 m s‑1
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