FormulaMgF2
Growth methodStockbarger technique
Max. sizes, (mm)Ø90
Transmission range, (µm)
(Thickness 10 mm)
0.13 – 7.0
StructureTetragonal
Density (g/cm3)3.18
Melting point (°C)1255
Hardness (Mohs)6
Thermal expansion coefficient (10-6/K)Parallel c-axis: 10.86 – 14.54
Thermal conductivity (W m-1 K-1)Undeclared
Specific heat capacity (J kg-1K-1)920
Solubility in water (g/100 cm3)0.0076
Solubility in acidsSoluble
Solubility in organic solventsInsoluble in alcohol
Wavelength (µm)
Refractive index no
Refractive index ne
0.2
0.5
1.0
3.0
5.0
7.0
1.4231
1.3797
1.3736
1.3618
1.3400
1.3044
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

Magnesium Fluoride for UV, VIS and IR-range