Europium - 63Eu: physical properties
Density properties
 Density of solid: 5244 kg m‑3 Density of solid: 5244 kg m‑3
 Molar volume: 28.97 cm3 Molar volume: 28.97 cm3
Elastic properties
 Young's modulus: 18 GPa Young's modulus: 18 GPa
 Rigidity modulus: 7.9 GPa Rigidity modulus: 7.9 GPa
 Bulk modulus: 8.3 GPa Bulk modulus: 8.3 GPa
 Poisson's ratio: 0.15 (no units) Poisson's ratio: 0.15 (no units)
Hardnesses
 Mineral hardness: (no data) (no units) Mineral hardness: (no data) (no units)
 Brinell hardness: (no data) MN m-2 Brinell hardness: (no data) MN m-2
 Vickers hardness: 167 MN m-2 Vickers hardness: 167 MN m-2


Electrical properties
 Electrical resistivity: 90 × 10‑8 Ω m; or mΩ cm Electrical resistivity: 90 × 10‑8 Ω m; or mΩ cm
Heat and conduction
 Thermal conductivity: 14 W m‑1 K‑1 Thermal conductivity: 14 W m‑1 K‑1
 Coefficient of linear thermal expansion: 35 × 10‑6 K‑1 Coefficient of linear thermal expansion: 35 × 10‑6 K‑1
Optical properties
 Reflectivity: (no data) % Reflectivity: (no data) %
 Refractive index: (no data) (no units) Refractive index: (no data) (no units)
Acoustic properties
 Velocity of sound: (no data) m s‑1 Velocity of sound: (no data) m s‑1

