Barium Fluoride (BaF2)

Barium Fluoride (BaF2) Data Sheet

Product and technology advantages
High transparency in the VUV and transparency in the visible and infrared range (multispectral effect)
High uniformity of the refractive index
Low birefringence including large dimension elements
Due to combined crystal growth and annealing the process has high flexibility.

Application
Optical parts of devices operating in the spectral range from 0.14 to 12 microns - high-power pulsed CO2 lasers, thermal imaging devices, Fourier spectroscopy and UV spectroscopic instruments.

Optical characteristics
baf2 trans

Transmission Range :0.15 to 12 m
Refractive Index :1.45 at 5 m (1)
Reflection Loss :6.5% at 5 m (2 surfaces)
Absorption Coefficient:3.2 x 10-4 cm-1 @ 6 m
Reststrahlen Peak :47 m
dn/dT:-15.2 x 10-6/C (2)
dn/d = 0 :1.95 m
Density :4.89 g/cc
Melting Point :1386C
Thermal Conductivity:11.72 W m-1 K-1 @ 286 K
Thermal Expansion:18.1 x 10-6/C @ 273 K
Hardness :Knoop 82 with 500g indenter (4)
Specific Heat Capacity:410 J Kg-1 K-1 (3)
Dielectric Constant :7.33 at 1 MHz
Youngs Modulus (E) :53.07 GPa (3)
Shear Modulus (G) :25.4 GPa (3)
Bulk Modulus (K) :56.4 GPa
Elastic Coefficients :C11 = 89.2 C12 = 40.0 C44 = 25.4 (2)
Apparent Elastic Limit :26.9 MPa (300psi) (4)
Poisson Ratio :0.343
Solubility :0.17g/100g water at 23C
Molecular Weight :175.36
Class/Structure :Cubic CaF2, Fm3m, (111) cleavage
No = Ordinary Ray
mNomNomNo
0.14081.81500.14521.78200.14771.7670
0.15001.67800.20001.5570.26521.5122
0.28031.50660.28931.50390.29671.5019
0.30211.50040.31301.49780.32541.4952
0.34031.49250.34661.49150.36101.4894
0.36631.48870.40461.48440.54611.4759
0.58931.47440.64381.47300.65631.4727
0.70651.47180.85211.46990.89441.4694
1.01401.46851.12871.46781.36731.4667
1.52951.46611.68101.46561.70121.4655
1.97011.46472.32541.46362.67381.4623
3.24341.46023.42201.45945.13801.4501
5.54901.447326.23801.44226.63311.4390
7.04421.43537.26801.43319.72401.4051
10.3461.3936

Grown Crystals Maximum Dimensions
O 320 x 150 x 22 mm

Fabricated Optics Maximum Dimensions
O 110..320 5..150 mm

Delivery options
Blanks, SMTY, Windows, Lenses

Delivery Terms
Standart shipment time 3 weeks