Magnesium
Fluoride (MgF2) is commonly used for UV windows,
lenses and polarisers. It is also usful in
its transmission range for some IR spectroscopy applications. Eastman Kodak produced this material in polycrystalline
form as Irtran-1® (not to be confused with Irtran-2®
which was ZnS).
Optical
Properties - Magnesium Fluoride (MgF2) Optical
Crystals
Transmission
Range: 130 nm to 9 microns
Refractive
Index: 1.37-1.38
Reflection
Loss: 11.2% @ 120 nm, 4% @ 3 microns ( 2 surfaces)
Physical
Properties--Magnesium Fluoride (MgF2)Optical
Crystals
Melting
Point: 1255° C
Hardness
(Knoop): 415 psi
Young's
Modulus: 138.5 GPa
Apparent
Elastic Limit: 7200 psi
Structure:
Tetragonal
Chemical
Properties-Magnesium Fluoride (MgF2)Optical
Crystals
Solubility:
<0.0002 gm./100 gm
water @ 0° C.
