Calcium Fluoride (CaF2) Optical Material

Calcium fluoride is a non-glass optical ceramic material.

Material Properties

Density3.2 g/cm3 (200 lb/ft3)

Elastic (Young's, Tensile) Modulus80 GPa (12 x 106 psi)

Knoop Hardness160

Light Transmission Range0.15 to 9.0 µm

Melting Onset (Solidus)1420 °C (2590 °F)

Poisson's Ratio0.26

Refractive Index1.4

Shear Modulus34 GPa (4.9 x 106 psi)

Specific Heat Capacity860 J/kg-K

Thermal Conductivity9.7 W/m-K

Thermal Diffusivity3.5 m2/s

Thermal Expansion19 µm/m-K

The length of each bar compares the given value to the highest value in the database.

Further Reading

Handbook of Optical Constants of Solids, Edward D. Palik (editor), 1998

Handbook of Optical Materials, Marvin J. Weber, 2003