Almaz Optics, Inc.
12 Chadsford Ct.  Marlton, NJ 08053, USA
Tel:  856 797-0491, Fax: 856 797-0228
e-mail: mail@almazoptics.com

 

































MAGNESIUM FLUORIDE MgF2

Magnesium Fluoride is used for optical elements in the ultraviolet and infrared where extreme ruggedness and durability is required. Its useful transmission range is 0.11 Ám - 7.5 Ám. Irradiation does not lead to color centers.
Maximum available size: 50 mm Dia x 40 mm Thk.


Sample thickness 10 mm


Main Properties

Chemical Formula MgF2
Crystal Class tetragonal
Lattice Constant, ┼ a=4.64; c=3.06
Molecular Weight 62.31
Density, g/cm3 at 291 K 3.18
Reflection Loss, % for two surfaces in the visible 4.8
Dielectric Constant for 95 x 103-42x106 Hz 5.45
Melting Temperature, K 1528
Thermal Conductivity, W/(m K) at 300 K 14-15
Thermal Expansion, 1/K at 310 K
parallel
perpendicular

14x10-6
8.9x10-6
Specific Heat, cal/(g K)
at 298 K
at 1700 K

0.24
0.362
Bandgap, eV 10.8
Solubility in water None
Knoop Hardness, kg/mm2 415
Young's Modulus, GPa 138.5
Shear Modulus, GPa 54.66
Bulk Modulus, GPa 101.32
Apparent Elastic Limit, MPa 49.64
Poisson Ratio 0.276

Refractive Index

Wavelength, Ám 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