(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
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 |
