FormulaCaF2
Growth methodStockbarger technique
Max. sizes, (mm)Ø200
Transmission range, (µm)
(Thickness 10 mm)
0.15 – 9.0
Structurecubic
Density (g/cm3)3.18
Melting point (°C)1418
Hardness (Mohs)4
Thermal expansion coefficient (10-6/K)16.2-19.4
Thermal conductivity (W m-1 K-1)9.71
Specific heat capacity (J kg-1 K-1)888
Solubility in water (g/100 cm3)0.0016
Solubility in acidsunessential
Solubility in organic solventsinsoluble in acetone
Wavelength (µm)
Refractive index
0.2
0.5
1.0
5.0
10.0
12.0
1.4951
1.4365
1.4289
1.3990
1.3002
1.2299
Absorption coefficient (cm-1)0.10 at 0.2 µm
0.01 at 0.4 µm
0.03 at 2.6 – 2.9 µm

Calcium Fluoride for UV, VIS and IR-range