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Optical constants of CRYSTRAN - optical materials
BaF2

Wavelength: µm
 (0.120–15.00)  
 

Complex refractive index (n+ik)[ i ]


n   k   LogX   LogY   eV

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

[CSV - comma separated]   [TXT - tab separated]   [Full database record]

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