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Basic Properties of MgF2 Crystal

Transparency Range: 130 - 9000 nm

material-caf.GIF (11527 bytes)

Transmission Curve

Crystal Symmetry: Tetragonal
Lattice Constants: a= b=4.621; c=3.053
Density:  3.18 g/cm3
Thermo-Optic Coefficients (@20 deg, 632nm)
dno/dT= 1.1 x 10-6 /oC
dne/dT= 0.58 x 10-6/oC
Optical Homogeneity: Δn < 10-6/cm
Mohs Hardness:  6
Thermal Conductivity:  11.6 W/m/K
Thermal Expansion Coefficients:   αa = 13.8 x 10-6/K
  αc =  8.5 x 10-6/K

Sellmeier Equations (λ in m):
no2=1+0.48755λ2/(λ2-0.00188) + 0.39875λ2/(λ2- 0.00895)+2.31204λ2/(λ2- 566.136)
n
e2
=1+0.41344λ2/(λ2-0.00136) + 0.50498λ2/(λ2- 0.00824)+2.49045λ2/(λ2- 565.108)  

 Wavelength(nm) no ne Birefringence
(Δn=ne-no)
Walk-off Angle
 at 45
5000 1.3340 1.3428 0.023 -0.37
2500 1.3642 1.3752 0.030 -0.45
1064 1.3731 1.3847 0.032 -0.48
800 1.3750 1.3867 0.032 -0.48
632.8 1.3770 1.3888 0.032 -0.49
532 1.3789 1.3907 0.033 -0.49
355 1.3869 1.3991 0.034 -0.50
266 1.3989 1.4116 0.035 -0.52


 

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