Beryllium: physical properties
Mechanical properties
Density properties
Density of solid: 1848 kg m‑3
Molar volume: 4.85 cm3
Elastic properties
Young's modulus: 287 GPa
Rigidity modulus: 132 GPa
Bulk modulus: 130 GPa
Poisson's ratio: 0.032 (no units)
Hardnesses
Mineral hardness: 5.5 (no units)
Brinell hardness: 600 MN m-2
Vickers hardness: 1670 MN m-2
Electrical properties
Electrical resistivity: 3.8 × 10‑8 Ω m; or mΩ cm
Heat and conduction
Thermal conductivity: 190 W m‑1 K‑1
Coefficient of linear thermal expansion: 11.3 × 10‑6 K‑1
Optical properties
Reflectivity: (no data) %
Refractive index: (no data) (no units)
Acoustic properties
Velocity of sound: 13000 m s‑1
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