Magnesium Fluoride (MgF2 crystal) is used for optical elements where extreme ruggedness and durability is required. Its useful transmission range is 0.11 μm - 8.5 μm. MgF2 single crystals is a positive crystal and slightly birefringent and usually supplied with the optic axis cut perpendicular to the window faces.
Product Presentation
MgF2 crystal has the following exceptional properties:
(1) High optical transmittance from the vacuum ultraviolet to the infrared spectrum region (0.118.5μm).
(2) Resistant to mechanical and thermal shock, to radiation.
(3) Chemically stable.
(4) Used for Optical prisms, lenses, wedges, windows, other optical components and etc.
(5) A positive birefringent crystal, used for optical fiber communication
Specification
Material: Anisotropic synthetic sapphire crystal (Al2O3) Orientation: Random Diameter Tolerance: +0.0, -0.1mm Thickness Tolerance: : +/- 0.2mm Clear Aaperture: >80% Parallelism: 1 arc minutes Surface Quality: 40-20 scratch and dig Flatness: λ\2 at 632.8 nm Protective Bevel | ![]() |
Other sizes and coating are available upon requirements
Main Properties of MgF2 crystal:
Formula | MgF2 |
Density | 3.18 g/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 9×10(–6) ∥C 14 ×10(–6) / K |
Hardness (Knoop) | 415,576 kg/mm2 |
Hardness (Mho) | 5—6 |
Young’s Modulus | 138.5 GPa |
Shear Modulus | 54.66 GPa |
Bulk Modulus | 101.32 GPa |
Rupture Modulus | 49.6 MPa |
Elastic Coefficient | C11=140 C12=89 C44=57 C13=63 C66=96 |
Dielectric Constant | 105 ~107 Hz 5.45 |
Solubility in Water | 0.0076 g / 100 g, 18℃ |
Lattice Constant | a=4.64 Å, c=3.06 Å |
Crystal Type | Tetragonal,P42/mnm |
Cleavage Planes | (100), (110) |
Absorption Coefficient | 0.07 at 0.2µm,0.02 at 5.0µm |
Poisson's Ratio | 0.276 |
Transmission Range | 0.11 - 8.5 |
Vapour Pressure | 1 Pa(at 1150℃), 10 Pa(at 1300℃) |
Applications | IR, UV , VUV and Excimer |
Fluorescence | weak yellow upon excitation at 590 nm |