Calcium Fluoride (CaF2)
Specialist Data Sheet
Product Name
Transmission Range
Refractive Index
Reflection Loss
Absorption Coefficient
Reststrahlen Peak
dN/dT
dN/du
Density
Melting Point
Thermal Conductivity
Thermal Expansion
Hardness
Specific Heat Capacity
Dialectric Constant
Youngs Modulus (E)
Shear Modulus (G)
Bulk Modulus (K)
Elastic Coefficients
Apparent Elastic Limit
Poisson Ratio
Solubility
Molecular Weight
Class/Structure
Calcium Fluoride (CaF2)
0.13 ~ 10 μm
1.39908 @ 5μm
5.4% @ 5 μ m
7.8 x 10-4 cm-1 @ 2.7 μ m
35 μ m
-10.6 x 10-6/℃
1.7 μ m
3.18 g/cc
1360 ℃
9.71 W m -1 K-1
18.85 x 10-6/℃
Knoop 158.3 (100) with 500g indenter
854 J Kg-1 K-1
6.76 @ 1 Mhz
75.8 Gpa
33.77 Gpa
82.71 Gpa
C11=164; C12=53; C44=33.7
36.54 Mpa
0.26
0.0017g/100g water @ 20℃
78.08
Cubic (111) cleavage
Notes:
Calcium fluoride is grown by vacuum Stockbarger technique in diameters up to about
250mm. Material for IR use is grown using naturally mined fluorite, in large quantities at
relatively low cost. For UV applications chemically prepared raw material is generally used
and for Eximer applications the highest grade of specially selected material and crystal.
Application:
Widespread IR application as spectroscopic windows, prisms and lenses. Specially pure
grades find useful application in the UV and as UV Eximer laser windows. Available doped
with europium as a gamma ray scintillator.
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Calcium Fluoride (CaF2)
Specialist Data Sheet
Refractive Index:
μm
0.149
0.161
0.195
0.200
0.222
0.248
0.266
0.280
0.300
0.337
No
1.5800
1.5490
1.5000
1.4950
1.4800
1.4680
1.4621
1.4584
1.4540
1.4481
μm
0.400
0.486
0.588
0.656
0.687
0.728
0.884
1.014
1.100
1.250
No
1.4419
1.4370
1.4339
1.4325
1.4320
1.4314
1.4298
1.4288
1.4283
1.4275
μm
1.650
1.900
2.058
2.450
2.700
2.800
3.050
3.400
4.000
4.400
No
1.4256
1.4244
1.4236
1.4214
1.4199
1.4192
1.4175
1.4149
1.4096
1.4057
μm
4.800
5.000
5.304
5.893
6.483
7.087
7.661
8.251
8.840
9.429
No
1.4014
1.3910
1.3952
1.3871
1.3782
1.3681
1.3570
1.3444
1.3308
1.3161
Transmission Range Graph:
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