Optics Material
High Power Crystals
Birefringent Crystals
Laser Crystal
NLO Crystal
Passive Crystal
E-O Q Crystal
Farady Crystal
Optical Crystal
Optical Glass
Color Glass
Products
Optical Component
Optics Material
     MgF2
Home >> Birefringent Crystals >> MgF2 

MgF2 single crystal is a birefrigent material with particular properties. It has a high resistance to mechanical and thermal shock and radiation. With wide transparent range and high transmissibility, it becomes a popular choice for VUV and excimer laser windows, polarizers, prisms, lenses, wedges, windows, and other optical components.

Basic Properties
Formula MgF 2
Lattice Constant a= b=4.621A ; c= 3.053A
Transmission range 0.13 - 7.0µm 
Density 3.18 g /cm 3
Melting point 1255 ¡ãC
Hardness (Mohs) 6
Specific heat capacity 920 J kg -1 K -1
Solubility in water 0.0076 g / 100 cm3
Thermal expansion coefficient (10 -6 /K) parallel c-axis: 10.86 - 14.54
vertical c-axis: 6.23 - 9.25
Wavelength (µm)  0.2 0.5 1.0 3.0 5.0 7.0
Refractive index n o 1.4231 1.3797 1.3736 1.3618 1.3400 1.3044
n e 1.4367 1.3916 1.3852 1.3724 1.3487 1.3101
Absorption coefficient (cm -1 ) 0.07 at 0.2 µm; 0.02 at 5.0 µm

Specifications:
Material: Magnesium Fluoride single crystal
Diameter Tolerance: +0.0, -0.1mm ,
Thickness Tolerance: ¡À 0.2mm
Clear Aperture: >80%
Parallelism: 1 arc minute
Flatness: ¦Ë /2 at 632.8 nm
Surface quality: 40-20 scratch and dig