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Barium Fluoride (BaF2)

Barium Fluoride (BaF2)

APPLICATIONS: Spectroscopic components extending into the IR slightly further than CaF2. High density scintillator material with fast timing application.

Optical Properties

Transmission Range 0.15 to 12.5 microns
Refractive Index 1.4626 at 2.6 microns
Reflection Loss 6.8% at 2.6 microns(2 surfaces)
Restrahelen Peak 47 microns
dN/dT

-15.2 x 10-6/C

Physical Properties

Density 4.89gm/cc
Melting Point 1280C
Thermal Conductivity

11.7 2 Wm-1 K -1 at 13C

Thermal Expansion 18.1 x 1 0-6/C at -100 to +120C
Hardness Knoop 82 with 500gm indenter
Specific Heat Capacity

410KJgm-l K -1 at 27C

Dielectric Constant

7.33 at 2MHz

Young's Modulus (E) 53.07 Gpa
Shear Modulus (G) 25.4 Gpa
Bulk Modulus (K) 56.4 Qpa
Elastic Coeffcients Cl1=89.2
C12=40.0
C44=25.4
Apparent Elastic Limit 26.89 Mpa
Poisson Ratio 0.343

Chemical Properties

Solubility 0.17 gm/100 gm water at 23C
Molecular Weight 175.36
Class/Structure

Cubic CaF2 (1 1 1) cleavage

Index of Refraction

0.2652 microns

1.51217

0.3130 microns 1.49782
1.01398 microns 1.46847
1.681 microns 1.46561
1.97009 microns 1.46472
2.5766 microns 1.46262
3.422 microns 1.45940
5.549 microns l.44732
7.0442 microns l.43529
10.346 microns 1.39636