Shalom

Specification

Material

MgF2 Crystal

Wavelength

110~8500nm

Size

0.1mm-100mm

Surface Quality

20/10 S/D

Optical Axis Orientation

<6 arc min

Parallelism

<1 arc sec

Flatness

λ/10 @ 633nm

Clear Aperture         

＞95% of full aperture

Basic Properties

Transparency Range

0.11~7.5 μm

Molecular Weight

62.32

Class/Structure

Tetragonal, can cleave on C-axis

Density

3.177g/cm²

Melting Point

1255℃

Hardness

Knoop 415 kg/mm²

Specific Heat Capacity, cal/(g K)

0.24 @ 298K  0.362@1700K

Thermal Conductivity

0.3 W/(m K) at 27 °C

Thermal Expansion

13.7and 8.48 x 10-6e/ °C

Refractive Index

N0=1.3836 Ne=1.3957 @ 0.405 μm

Reflection Loss

11.2% @ 0.12 μm (2 surfaces)

Dielectric Constant

4.87 parallel and 5.45 perpendicular

Restrahlen Peak

20 μm

dN/dT

+2.3 and +1.7 x 10-6e/ °C at 0.4 μm

Elastic Coefficients

C11=140.2 C12=89.5 C44=56.8

C33=204.7 C13=62.9 C66=95.7

Young's Modulus (E)

Shear Modulus (G)

Bulk Modulus (K)

138.5 GPa

54.66 GPa

101.32 GPa

Apparent Elastic Limit

49.64 MPa

Poisson Ratio

0.276

Solubility

<0.0002 g/100g water @ 0 °C