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Magnesium Fluoride (MgF2)

Magnesium Fluoride (MgF2) Data Sheet

Product and technology advantages
• High transparency in the VUV and transparency in the visible and infrared range (multispectral effect).
• High uniformity of the refractive index.

Due to combined crystal growth and annealing the process has high flexibility.

Application
Optical parts of devices operating in the spectral range from 0.12 to 7 microns, UV sources and receivers,polarimetric devices, achromatic fractional-wave plates, quantum electronics devices.

Optical Characteristics

MgF2 transmission

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, can cleave on c-axis
No = Ordinary Ray    Ne = Extraordinary Ray
µm   NoNeµm   NoNeµm   NoNe
0.1137   1.7805 0.1149   1.7420 0.1179   1.6800 
0.1198   1.6510 0.121   1.6281.6320.130   1.5661.568
0.140   1.50951.5230.150   1.4801.4940.160   1.4611.475
0.170   1.4481.4620.180   1.4391.4530.190   1.4311.444
0.200   1.4231.4370.220   1.4131.4260.248   1.4031.416
0.257   1.4011.4140.266   1.3991.4120.280   1.3961.409
0.300   1.3931.4050.330   1.3891.4020.337   1.3891.401
0.350   1.3871.4000.355   1.3861.3990.400   1.3841.396
0.546   1.3791.3900.700   1.3761.3881.087   1.3731.385
1.512   1.3701.3822.000   1.3681.3792.5   1.3641.375
3.030   1.3601.3703.571   1.3541.3644.000   1.3491.359
4.546   1.3411.3505.000   1.3341.3435.556   1.3241.332
6.060   1.3141.321

Grown Crystals Maximum Dimensions
60 x 60 x 70 mm

Fabricated Optics Maximum Dimensions
O 54 ő 70 mm

Delivery options
Blanks, SMTY, Windows, Lenses

Delivery Terms
Standart shipment time 3 weeks