|
|
|
Syngony
|
Cubic
|
|
Symmetry Class
|
m3m
|
|
Lattice Constants, Angstroms
|
a=5.462 c=a
|
|
Cleavability
|
(111), perfect
|
|
|
|
|
Refractive Index at ne
|
1.4349
|
|
Refractive Index at nF'-nC'
|
0.0043
|
|
Refractive Index at n10.6
|
1.2996
|
|
Thermal Coefficient of Refractive Index at l=3.39 microns, îÑ-1
for +/-60îÑ
|
(-0.95...-1.17)• 10-5
|
|
Transmission Range, microns (thickness 10ìì)
|
0.15¸9.0
|
|
Transmittance ti(l) vs. wavelength l
|
|
|
|
|
|
|
|
Internal Transmittance ti(l) vs.
wavelength l
CaF2 Calcium Fluoride
|
|
l,ìêì
|
ti(l)
|
|
0.2
|
0.87
|
|
0.5
|
0.97
|
|
1.0
|
0.99
|
|
3.0
|
0.99
|
|
5.0
|
0.99
|
|
6.0
|
0.98
|
|
7.0
|
0.97
|
|
8.0
|
0.88
|
|
9.0
|
0.59
|
|
10.0
|
0.19
|
|
|
|
Refractive Index n vs.
wavelength l
CaF2 Calcium Fluoride
|
|
l,ìêì
|
n(l)
|
|
0.2
|
1.4951
|
|
0.5
|
1.4365
|
|
1.0
|
1.4289
|
|
2.0
|
1.4239
|
|
3.0
|
1.4179
|
|
4.0
|
1.4096
|
|
5.0
|
1.3990
|
|
6.0
|
1.3856
|
|
7.0
|
1.3693
|
|
8.0
|
1.3498
|
|
9.0
|
1.3268
|
|
10.0
|
1.3002
|
|
11.0
|
1.2676
|
|
12.0
|
1.2299
|
|
|
|
|
|
Thermal Linear Expansion at, îÑ-1 for +/-60îÑ
|
(16.2¸19.4)•10-6
|
|
Thermal Conductivity, W/(m • îÑ) at 36 îÑ
|
9.71
|
|
Specific Heat Capacity, J/(kg • îÑ) at 40 îÑ
|
887.6
|
|
Thermal Stability, îÑ
|
20+/-2
|
|
Melting Point, îÑ
|
1418
|
|
|
|
|
Density, g/cm3 at 20 îÑ
|
3.18
|
|
Mohs Hardness
|
4
|
|
Vickers Microhardness , Pa
|
165• 107
|
|
Constants of Elastic Compliance, Pa-1
|
S11
|
6.83• 10-12
|
|
S12
|
-1.53• 10-12
|
|
S44
|
29.58• 10-12
|
|
Poisson Ratio
|
0.216
|
|
Young Modulus (Å), Pa
|
<100>
|
14.61• 1010
|
|
<100>
|
8.99• 1010
|
|
Shear Modulus (G), Pa
|
(100)
|
4.76• 1010
|
|
(100)
|
3.38• 1010
|
|
|
|
|
Solubility CaF2 ( Calcium Fluoride )
|
|
in water at 18 îÑ g/100cm3
|
|
0.0016
|
|
"Opto-Technological Laboratory" produces lenses, windows, prisms, wedges, ball lenses, cylindrical lenses, windows for spectrophotometers and others optical components according to customers’ specifications and drawings out of crystals calcium fluoride ( CaF2 ) . |
