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Magnesium Fluoride (MgF2)

♦ Magnesium Fluoride (MgF2) Data Sheet   ♦ Magnesium Fluoride (MgF2) MSDS

Magnesium Fluoride transmits well into the VUV region to the hydrogen Lyman-alpha line (121nm) and beyond. Magnesium Fluoride is used mostly for UV optics and is excellent for Excimer laser applications.

Transmission Range : 0.12 to 7 μm (1)
Refractive Index : No 1.413 at 0.22 μm (4)
Reflection Loss : 5.7% at 0.22 μm (2 surfaces)
Absorption Coefficient : 40 x 10-3 cm-1 at 2.7 μm
Reststrahlen Peak : 20 μm (1)
dn/dT : 2.3 (para) 1.7 (perp) at 0.4 μm (1)
dn/dμ = 0 : 1.4 μm
Density : 3.18g/cc
Melting Point : 1255°C
Thermal Conductivity : 21 (para) 33.6 (perp) W m-1 K-1 at 300K (3)
Thermal Expansion : 13.7 (para) 8.9 (perp) x 10-6 /K (1)
Hardness : Knoop 415
Specific Heat Capacity : 1003 J Kg m-1 K-1
Dielectric Constant : 4.87 (para) 5.45 (perp) at 1MHz (1)
Youngs Modulus (E) : 138 GPa (2)
Shear Modulus (G) : 54.66GPa (2)
Bulk Modulus (K) : 101.32 GPa (2)
Elastic Coefficients : C11=140 C12=89 C44=57 C13=63 C66=96 (2)
Apparent Elastic Limit : 49.6 MPa (7200 psi)
Poisson Ratio : 0.276 (2)
Solubility : 0.0002g/100g water
Molecular Weight : 62.32
Class/Structure : Tetragonal P42/mnm (#136) Rutile Structure. Can cleave on c-axis but not easily.

 but not easilyTo download this data or our MSDS safety data sheet as a pdf, please click on the links at the top of the page.  To expand the transmission graphs, please click on the image.

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µm   NoNeµm   NoNeµm   NoNe
0.1137    1.7805   0.1149    1.7420   0.1179    1.6800  
0.1198    1.6510   0.121    1.628 1.632 0.130    1.566 1.568
0.140    1.5095 1.523 0.150    1.480 1.494 0.160    1.461 1.475
0.170    1.448 1.462 0.180    1.439 1.453 0.190    1.431 1.444
0.200    1.423 1.437 0.220    1.413 1.426 0.248    1.403 1.416
0.257    1.401 1.414 0.266    1.399 1.412 0.280    1.396 1.409
0.300    1.393 1.405 0.330    1.389 1.402 0.337    1.389 1.401
0.350    1.387 1.400 0.355    1.386 1.399 0.400    1.384 1.396
0.546    1.379 1.390 0.700    1.376 1.388 1.087    1.373 1.385
1.512    1.370 1.382 2.000    1.368 1.379 2.5    1.364 1.375
3.030    1.360 1.370 3.571    1.354 1.364 4.000    1.349 1.359
4.546    1.341 1.350 5.000    1.334 1.343 5.556    1.324 1.332
6.060    1.314 1.321

Magnesium Fluoride is grown by vacuum Stockbarger technique in ingots of various diameters. Magnesium Fluoride is a tough material and polishes well. Therefore, it can be worked to the highest standards. MgF2 is slightly birefringent and usually supplied with the optic axis cut perpendicular to the window faces.

REFERENCES:
(1) Duncanson et.al. Proc.Phys.Soc. V72, p1001, 1958
(2) Kandil et.al. J.App.Phys. V52, p749, 1981
(3) Kashnow & MCarthy, J.Phys.Chem. V30, p813, 1969
(4) Laporte et. al. J.Opt. Soc. Am. V73, No 8, p1062


Magnesium Fluoride - Tetragonal, Rutile structure, P42/mnm (#136)
a=b=4.6213Å c=3.0519Å
Crystal models by miramodus.com
Magnesium FluorideMagnesium Fluoride