Resource
CaF2 (Calcium Fluoride)
Physical and optical properties
Transmission Range : |
0.13 to 10 μm |
Refractive Index : |
1.39908 at 5 μm (1) (2) |
Reflection Loss : |
5.4% at 5 μm |
Absorption Coefficient : |
7.8 x 10-4 cm-1 @ 2.7 μm |
Reststrahlen Peak : |
35 μm |
dn/dT : |
-10.6 x 10-6/°C (3) |
dn/dμ = 0 : |
1.7 μm |
Density : |
3.18 g/cc |
Melting Point : |
1360°C |
Thermal Conductivity : |
9.71 W m-1 K-1 (4) |
Thermal Expansion : |
18.85 x 10-6/°C (5)(6) |
Hardness : |
Knoop 158.3 (100) with 500g indenter |
Specific Heat Capacity : |
854 J Kg-1 K-1 |
Dielectric Constant : |
6.76 at 1MHz (7) |
Youngs Modulus (E) : |
75.8 GPa (7) |
Shear Modulus (G) : |
33.77 GPa (7) |
Bulk Modulus (K) : |
82.71 GPa (7) |
Elastic Coefficients : |
C11 = 164 C12 = 53 C44 = 33.7 (7) |
Apparent Elastic Limit : |
36.54 MPa |
Poisson Ratio : |
0.26 |
Solubility : |
0.0017g/100g water at 20°C |
Molecular Weight : |
78.08 |
Class/Structure : |
Cubic (111) cleavage |
Refractive Index
No = Ordinary Ray
µm |
No |
µm |
No |
µm |
No |
0.149 |
1.5800 |
0.161 |
1.5490 |
0.195 |
1.5000 |
0.200 |
1.4950 |
0.222 |
1.4800 |
0.248 |
1.4680 |
0.266 |
1.4621 |
0.280 |
1.4584 |
0.300 |
1.454 |
0.337 |
1.4481 |
0.400 |
1.4419 |
0.486 |
1.4370 |
0.588 |
1.4339 |
0.656 |
1.4325 |
0.687 |
1.4320 |
0.728 |
1.4314 |
0.884 |
1.4298 |
1.014 |
1.4288 |
1.100 |
1.4283 |
1.250 |
1.4275 |
1.650 |
1.4256 |
1.900 |
1.4244 |
2.058 |
1.4236 |
2.450 |
1.4214 |
2.700 |
1.4199 |
2.800 |
1.4192 |
3.050 |
1.4175 |
3.400 |
1.4149 |
4.000 |
1.4096 |
4.400 |
1.4057 |
4.800 |
1.4014 |
5.000 |
1.3991 |
5.304 |
1.3952 |
5.893 |
1.3871 |
6.483 |
1.3782 |
7.072 |
1.3681 |
7.661 |
1.357 |
8.251 |
1.3444 |
8.840 |
1.3308 |
9.429 |
1.3161 |
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Product Notes