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Birefringent Crystals
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Magnesium Fluoride (MgF2) is good birefringent crystal with good transmission over 120-7000nm. It is a hard material which is resistant to thermal and mechanical shock and can be worked according to the highest standards. MgF2 single crystals is a positive birefringent crystal and widely used for Optical prisms, lenses, windows and other optical components.
Transmission Range | 0.11-8.5um |
Density | 3.16g/cm3 |
Melting Point | 1255℃ |
Boiling point | 2239℃ |
Molecular Weight | 62.32 |
Thermal Conductivity | 3.15W/m K |
Specific Heat | 920 J/(kg K) |
Thermal Expansion | || C: 14 x 10-6/°C ; ⊥C: 9 x 10-6 /°C |
Hardness | 5-6 |
Young’s Modulus | 138.5 GPa |
Elastic Coefficient | C11=140 C12=89 C44=57 C13=63 C66=96 |
Dielectric Constant | 105 ~107 Hz 5.45 |
Solubility in Water | 0.0076g/100 g, 18℃ |
Lattice Constant | a=4.64Å, c=3.06Å |
Crystal Type | Tetragonal, P42/mnm |
Cleavage Planes | (100), (110) |
Absorption Coefficient | 0.07 at 0.2µm, 0.02 at 5.0µm |
Physical and Optical Properties:
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