MgF2 Crystal

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 UV and excimer laser windows, polarizers, prisms, lenses, wedges, windows, and other optical components.

Features：

High optical transmittance from the vacuum ultraviolet to the infrared spectrum region(0.11～8.5μm). 

Chemically stable.

Used for Optical prisms, lenses, wedges, windows, other optical components,and etc.

A positive birefringent crystal used for optical fiber communication.

 

OPTICAL
Transmission Range	0.11 to 7.5 microns
Refractive Index	N0=1.3836 Ne=1.3957 at 0.405 microns
Reflection Loss	11.2% at 0.12 microns (2 surfaces)
Restrahlen Peak	20 microns
dN/dT	+2.3 and +1.7 x 10-6e/ °C at 0.4 microns
PHYSICAL
Density	3.177 g/cm3
Melting Point	1255 °C
Thermal Conductivity	0.3 W/(m K) at 27 °C
Thermal Expansion	13.7and 8.48 x 10-6e/ °C
Hardness	Knoop 415 kg/mm2
Specific Heat Capacity, cal/(g K)  at 298 K  at 1700 K	0.24  0.362
Dielectric Constant	4.87 parallel and 5.45 perpendicular
Young's Modulus (E)	138.5 GPa
Shear Modulus (G)	54.66 GPa
Bulk Modulus (K)	101.32 GPa
Elastic Coefficients	C11=140.2 C12=89.5 C44=56.8  C33=204.7 C13=62.9 C66=95.7
Apparent Elastic Limit	49.64 MPa
Poisson Ratio	0.276
CHEMICAL
Solubility	<0.0002 g/100g water at 0 °C
Molecular Weight	62.32
Class/Structure	Tetragonal, can cleave on C-axis