FormulaLiF
Growth methodStockbarger technique
Max. sizes, (mm)Ø150
Transmission range, (µm)
(Thickness 10 mm)
0.12 – 6.5
StructureCubic
Density (g/cm3)2.60
Melting point (°C)870
Hardness (Mohs)4
Thermal expansion coefficient (10-6/K)28.1 – 34.8
Thermal conductivity (W m-1 K-1)14.2
Specific heat capacity (J kg-1 K-1)1562
Solubility in water (g/100 cm3)0.27
Solubility in acidsSoluble
Solubility in organic solventsInsoluble in acetone and ethylalcohol
Wavelength (µm)
Refractive index
0.2
0.5
1.0
3.0
5.0
6.0
1.4390
1.3943
1.3871
1.3666
1.3266
1.2975
Absorption coefficient (cm-1)0.05 at 0.2 µm
0.02 at 0.4 µm
0.03 at 2.6 – 2.9 µm

Lithium Fluoride for UV, VIS and IR-range