Formula CaF2
Growth method Stockbarger technique
Max. sizes, (mm) Ø200
Transmission range, (µm)
(Thickness 10 mm)
0.15 – 9.0
Structure cubic
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) 9.17
Specific heat capacity (J kg-1 K-1) 888
Solubility in water (g/100 cm3) 0.0016
Solubility in acids unessential
Solubility in organic solvents insoluble 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