Carbon - ₆C: physical properties

Density properties

Density of solid: 2267 kg m^‑3
Molar volume: 5.29 cm³

Elastic properties

Young's modulus: (no data) GPa
Rigidity modulus: (no data) GPa
Bulk modulus: 33 GPa
Poisson's ratio: (no data) (no units)

Hardnesses

Mineral hardness: 0.5 (graphite; diamond is 10.0) (no units)
Brinell hardness: (no data) MN m^-2
Vickers hardness: (no data) 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: about 1000 - direction dependent × 10^‑8 Ω m; or mΩ cm

Heat and conduction

Thermal conductivity: 140 W m^‑1 K^‑1
Coefficient of linear thermal expansion: 7.1 × 10^‑6 K^‑1

Optical properties

Reflectivity: 27 %
$refractive index of the chemical elements displayed on a miniature periodic table$ Refractive index: 2.417 (diamond) (no units)

Acoustic properties

Velocity of sound: 18350 m s^‑1