Barium Fluoride (BaF2)

Wir sind führender Hersteller und Lieferant von Forschungsmaterialien

Crystallographic

Syngony Cubic
Symmetry Class m3m
Lattice Constants a = 6.196 Å
c = a
Cleavability (111), perfect
 

Optical

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 3.39 microns for ±60 °C (-1.27) ... (-1.51) x 10-5
Transmission Range, microns 0.15 - 12.5
Absorbance m (l), cm -1
  at 0.2 microns 0.2
  at 0.4 microns 0.08
  at 10.6 microns 0.13
 

Thermal

Thermal Linear Expansion, °C-1
for ±60 °C		 (16.5 ... 19.2) x 10-6
Thermal Conductivity, W/(m * °C)
at 38 °C		 7.1
Specific Heat Capacity, J/(kg * °C) 0.456 x 103
Thermal Stability, °C 10 ±2
Melting Point, °C 1354
 

Mechanical

Density, g/cm3 at 20 °C 4.83
Mohs Hardness 3
Vickers Microhardness, Pa 82 x 107
Constants of Elastic Compliance, Pa-1 S11 = 15.30 x 10-12
S12 = -4.69 x 10-12
S44 = 39.47 x 10-12
Young Modulus (E), Pa
   in <100> direction 6.54 x 1010
   in <111> direction 6.63 x 1010
Shear Modulus (G), Pa
   in <100> direction 2.51 x 1010
   in <111> direction 2.53 x 1010
Poisson Ratio 0.307
 

Chemical

Molecular Weight 175.3
Solubility
   in water, gram/100 cm3 0.17
   in acids soluble
 

Ref. Index vs. Wavelength l

Wavelength, Microns Refractive Index
0.2 1.5573
0.5 1.4779
1.0 1.4686
2.0 1.4647
3.0 1.4612
4.0 1.4558
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
15.0 1.3050
 

Internal Transmittance t i (l) vs. Wavelength l

Wavelength, Microns Internal Transmittance
0.2 0.70
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 0.70
10.0 0.85
12.0 0.42

Custom sizes and specifications are available on request.


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