Thorium - ₉₀Th: physical properties

Density properties

Density of solid: 11724 kg m^‑3
Molar volume: 19.80 cm³

Elastic properties

Young's modulus: 79 GPa
Rigidity modulus: 31 GPa
Bulk modulus: 54 GPa
Poisson's ratio: 0.27 (no units)

Hardnesses

Mineral hardness: 3.0 (no units)
Brinell hardness: 400 MN m^-2
Vickers hardness: 350 MN m^-2

Heatscape representing the density of the elements — Heatscape picture representing the density of the periodic table elements.

Heatscape representing the molar volume of the elements — Heatscape representing the molar volume of the periodic table elements.

Electrical properties

Electrical resistivity: 15 × 10^‑8 Ω m; or mΩ cm

Heat and conduction

Thermal conductivity: 54 W m^‑1 K^‑1
Coefficient of linear thermal expansion: 11.0 × 10^‑6 K^‑1

Optical properties

Reflectivity: (no data) %
$refractive index of the chemical elements displayed on a miniature periodic table$ Refractive index: (no data) (no units)

Acoustic properties

Velocity of sound: 2490 m s^‑1