OPTICS CRYSTALS LASERS
   
 
Magnesium Fluoride (MgF2)

Magnesium Fluoride is used for optical elements in the wide spectral range where high transmission, extreme ruggedness and durability are required.

Magnesium Fluoride MgF2 crystals has high transmission in the spectral range 0.11 micron - 7.5 micron. Irradiation does not lead to color centers. Magnesium Fluoride is a rugged, hard material which is resistant to thermal and mechanical shock. Considerable mechanical shock is needed to cause cleavage which is near perfect when it occurs. The natural form of MgF2 is known as Sellaite. Magnesium Fluoride is a positive birefringent crystal grown normally to 135 mm diameter by vacuum Stockbarger technique, seeding along the C-axis.

Crystaltechno Ltd. grows Magnesium Fluoride MgF2 crystals and produces MgF2 optics with diameter up to 100 mm, thickness 30 mm. We offer manufacture of MgF2 blanks, MgF2 windows, MgF2 prisms, MgF2 polished domes and MgF2 lenses.

Spectral Transmittance of MgF2 Uncoated Polished Window thickness 4mm for ranges (200 - 1100) nm and (2.5 - 25) micron.


Crystaltechno Ltd. offers the manufacturing of MgF2 (magnesium fluoride) optics (in detail please see Catalog)

Perhaps you will find required Magnesium Fluoride (MgF2) optics at our stock, please see item Optical Crystals.

BASE PROPERTIES of Magnesium Fluoride (MgF2)

PARAMETER VALUE
OPTICAL PROPERTIES of MgF2  
  Transmission Range   0.11 to 7.5 microns  
  Refractive Index   N0=1.3836 Ne=1.3957 at 0.405 microns  
  Reflection Loss   at 0.200 micron (2 surfaces) for o-ray 5.9%; for e-ray 6.2%;  
  dn/dT   2.3 and 1.7 x 10-6/ °C at 0.4 microns  
  Restrahlen Peak   20 microns  
PHYSICAL PROPERTIES of MgF2  
  Density   3.177 g/cm3  
  Melting Point   125 °C  
  Thermal Conductivity   0.3 W/(m K) at 27 °C  
  Thermal Expansion   13.7 and 8.48 x 10-6/°C  
  Hardness   415 kg/mm2  
  Specific Heat Capacity, cal/(g K)
at 298 K
at 1700 K
 
0.24
0.362
 
  Dielectric Constant   4.87 parallel and 5.45 perpendicular  
  Young's Modulus (E)   138.5 GPa  
  Shear Modulus (G)   54.66 GPa  
  Bulk Modulus (K)   101.32 GPa  
  Elastic Coefficients   C11=140.2 C12=89.5 C44=56.8 C33=204.7 C13=62.9 C66=95.7  
  Apparent Elastic Limit   49.64 MPa  
  Poisson Ratio   0.276  
CHEMICAL PROPERTIES of MgF2  
  Solubility   <0.0002 g/100g water at 0 °C  
  Molecular Weight   62.32  
  Class/Structure   Tetragonal, can cleave on C-axis  

MgF2 REFRACTIVE INDEX

  Wavelength, microns 0.20 0.23 0.27 0.34 0.56  
  Refractive Index (ne) 1.43 1.42 1.41 1.40 1.39  
  Refractive Index (no) 1.42 1.41 1.40 1.39 1.38  

 



 
 
 
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Ordering Info

 
  (c) Crystaltechno Ltd. Vernadskogo 113-106, Moscow 119571, Russia
+7 (495) 234-5951, 234-5952, 956-7610
fax +7 (495) 433-1551
sales@crystaltechno.com
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