MgF2
Description: Magnesium Fluoride (MgF2crystal) is a birefrigent material crystal with excellent physical and chemical properties. It is used for optical elements where extreme ruggedness and durabilit..
ProductsOptical CrystalBirefringent CrystalMgF2
MgF2
Description:
Magnesium Fluoride (MgF2 crystal) is a birefrigent material crystal with excellent physical and chemical properties. It is used for optical elements where extreme ruggedness and durability is required.
Applications:
l VUV and excimer laser windows, polarizers, and lenses;
l Supplied with the optic axis cut perpendicular to the window faces.
Physical Properties:
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Lattice constant
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a=4.621A; c=3.053A
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Mohs hardness
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6
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Melting Point
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1255℃
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Density
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3.18g/cm3(at 291K)
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Transparence range
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0.12 - 8.5mm
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Thermal conductivity
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0.0075W/m/K
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Expansion coefficient
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aa=13.7x10-6/K; ac=8.48x10-6/K
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Elastic Coefficients
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C11=140.2 C12=89.5 C44=56.8
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C33=204.7 C13=62.9 C66=95.7
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Apparent Elastic Limit
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49.6 MPa (7200 psi)
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Poisson Ratio
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0.276
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Optical Properties:
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Transparence range
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0.12-8.5mm
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Absorption Coefficient
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40 x 10-3 cm-1 at 2.7
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Reflection Loss
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5.2% at 0.6 microns (2 surfaces)
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Restrahlen Peak
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20
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dN/dT
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2.3 (parallel) & 1.7 x 10-6 (perp) at 0.4
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dN/d
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= 0 14
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Transmission Curve: