|
|
|
Syngony
|
Cubic
|
|
Symmetry Class
|
m3m
|
|
Lattice Constants, Angstroms
|
a=6.196 c=a
|
|
Cleavability
|
(111), perfect
|
|
|
|
|
Refractive Index at ne
|
1.4759
|
|
Refractive Index at nF'-nC'
|
0.0059
|
|
Refractive Index at n10.6
|
1.3926
|
|
Refractive Index at n8.0-n12.5
|
0.0673
|
|
Thermal Coefficient of Refractive Index at l=3.39 microns,îÑ-1
for +/-60îÑ
|
(-1.27...-1.51)• 10-5
|
|
Transmission Range, microns (thickness 10ìì)
|
0.18¸12
|
|
Transmittance ti(l) vs. wavelength l
|
|
|
|
|
|
|
|
Internal Transmittance ti(l) vs.
wavelength l
|
|
l,ìêì
|
ti(l)
|
|
0.2
|
0.60
|
|
0.5
|
0.96
|
|
1.0
|
0.97
|
|
3.0
|
0.97
|
|
5.0
|
0.97
|
|
6.0
|
0.97
|
|
7.0
|
0.97
|
|
8.0
|
0.97
|
|
9.0
|
0.97
|
|
10.0
|
0.85
|
|
12.0
|
0.42
|
|
|
|
Refractive Index n vs.
wavelength l
|
|
l,ìêì
|
n(l)
|
|
0.2
|
1.5573
|
|
0.5
|
1.4779
|
|
1.0
|
1.4686
|
|
2.0
|
1.4647
|
|
3.0
|
1.4612
|
|
4.0
|
1.4587
|
|
5.0
|
1.4511
|
|
6.0
|
1.4441
|
|
7.0
|
1.4357
|
|
8.0
|
1.4258
|
|
9.0
|
1.4144
|
|
10.0
|
1.4014
|
|
11.0
|
1.3865
|
|
12.0
|
1.3696
|
|
12.5
|
1.3585
|
|
15
|
1.3050
|
|
|
|
|
|
Thermal Linear Expansion at, îÑ-1 for +/-60îÑ
|
(16.5¸19.2)•10-6
|
|
Thermal Conductivity, W/(m •îÑ) at 38 îÑ
|
7.1
|
|
Specific Heat Capacity, J/(kg •îÑ)
|
456
|
|
Thermal Stability, îÑ
|
10+/-2
|
|
Melting Point, îÑ
|
1354
|
|
|
|
|
Density, g/cm3 at 20 îÑ
|
4.83
|
|
Mohs Hardness
|
3
|
|
Vickers Microhardness , Pa
|
82• 107
|
|
Constants of Elastic Compliance, Pa-1
|
S11
|
15.3• 10-12
|
|
S12
|
-4.69• 10-12
|
|
S44
|
39.47• 10-12
|
|
Poisson Ratio
|
0.307
|
|
Young Modulus (Å), Pa
|
<100>
|
6.54• 1010
|
|
<100>
|
6.63• 1010
|
|
Shear Modulus (G), Pa
|
(100)
|
2.51• 1010
|
|
(100)
|
2.53• 1010
|
|
|
|
|
Solubility BaF2 ( Barium Fluoride )
|
|
in water at 10 îÑ
g/100cm3
|
in acids
|
|
0.17
|
soluble
|
|
| "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 barium fluoride ( BaF2 ) . |
