Optical constants of CRYSTRAN - optical materials
BaF2
Complex refractive index (n+ik)
Derived optical constants
Comments
Barium Fluoride is grown by vacuum Stockbarger technique. Unlike CaF2, BaF2 is not found in the native state and all material must be synthesised chemically making BaF2 relatively expensive to produce. Barium Fluoride cleaves easily and is highly susceptible to thermal shock. It polishes well and can be etched (5). The highest purity Barium Fluoride VUV material can be qualified as fast scintillator grade (6). The highest purity Barium Fluoride VUV material can be qualified as fast scintillator grade (6).
REFERENCES:
(1) Handbook Optical Constants, ed Palik, V3, ISBN 0-12-544423-0
(2) I.H.Malitson; J.Opt.Soc.Am. Vol52, p1377, 1962
(3) D.Girlich; Elastic Constants of BaF2; Phys.Rev. Vol135, p1826, 1964
(4) S.Ballard et al; J.Opt.Soc.Am. Vol42, p684, 1952
(5) US patent. Chemical polish. 4,040,896 1977
(6) M.Laval et al; Nu. Insts.Meth, V206 p169, 1983
References
Crystran Ltd.
The Crystran handbook of infra-red and ultra-violet optical materials (5th edition, 2023)
See also
Crystran BaF2 online data sheet
Data
Additional information
Properties of BaF2
density:
-
value: 4890
thermal_dispersion:
-
type: constant
value: -1.52E-5
thermal_expansion:
-
temperature: 273
value: 1.81E-5
hardness:
-
type: Knoop
value: 804000000
melting_point:
-
value: 1641
thermal_conductivity:
-
temperature: 286
value: 11.72
youngs_modulus:
-
value: 53070000000
poissons_ratio:
-
value: 0.343
solubility:
-
temperature: 296
value: 1.7