Lithium Fluoride (LiF) Optical Material

Lithium fluoride is a non-glass optical ceramic material.

Material Properties

Density2.6 g/cm3 (160 lb/ft3)

Dielectric Constant (Relative Permittivity) At 1 MHz9.0

Elastic (Young's, Tensile) Modulus120 GPa (17 x 106 psi)

Electrical Dissipation At 1 MHz0.00020

Light Transmission Range0.12 to 6.5 µm

Melting Onset (Solidus)870 °C (1600 °F)

Poisson's Ratio0.27

Refractive Index1.4

Shear Modulus52 GPa (7.5 x 106 psi)

Specific Heat Capacity1560 J/kg-K

Thermal Conductivity12 W/m-K

Thermal Diffusivity3.0 m2/s

Thermal Expansion32 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