Barium Fluoride (BaF2)

Barium Fluoride boasts high transmission from 200nm to 14um and as such is used for instrumentation windows, lenses and other components.

Barium Fluoride's properties make it ideal for scintillation applications where it is utilised in x-ray, 511 keV gamma photon and other high energy particle detection.

Whilst BaF2 is the most resistant of the optical fluorides to high-energy radiation, it degrades in moisture and is susceptible to thermal shock, so care must be taken in systems intended for harsh environments.

Roditi's optical BaF2 material is single-crystal optical quality, fabricated to order.

Substance Form Diameter Range Thickness Range Transmission Range (µm) Surface Finish
Barium Fluoride Single Crystal 5mm - 200mm 1mm - 50mm 0.15 - 14.00 Fine Ground / Optical Polish

Material Properties

Transmission Range 0.20 - 14.0 microns
Internal Transmission >99% @ 0.4 to 9.0µm
Refractive Index Homogeneity 1.4759 @ ne
Reflection Loss % @ 3.0µm (2 surfaces)
Cleavage Plane <111>
Density 4.89 gm/cc
Melting Point 1368°C
Hydroscopic Slightly
Solubility 1.7gm/kg water @ 25°C
Knopp Hardness 82.0 Knoop
Crystal Structure Cubic <111> cleavage plane
Absorption Coefficient 3.2 x 10-4 @ 6µm
Thermal Expansion Coefficient 18.1 x 10-6