CaF2(Calcium Fluoride) crystal is not only a conventional
but also an excellent material for the applications of laser optics.
The crystal covers a very wide transmission range from 130nm to
9500 nm (UV, VIS and IR), especially, features a high transmittivity
in IR range. Those advantages make CaF2an ideal material
widely used in Laser, IR and UV optics for making optical windows
and lenses, etc.
Main Properties:
Formula
CaF2
Structure
Cubic
Growth Method
Stockbarger
Technique
Maximum Size
¦µ180 mm
Transmission Range (¦Ìm)
0.15 - 9.0
Density (g/cm3
3.18
Melting point (¡ãC)
1418
Hardness (Mohs)
4
Thermal Expansion Coefficient (10-6/K)
16.2-19.4
Thermal Conductivity(W m-1K-1)
9.17
Specific Heat Capacity (J kg-1K-1)
888
Solubility in Water (g/100 cm3)
0.0016
Solubility in Acids
unessential
Solubility in Organic Solvents
insoluble in acetone
Wavelength (¦Ìm)
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 ¦Ìm
0.01 at 0.4 ¦Ìm
0.03 at 2.6 -2.9 ¦Ìm
