FormulaSi
Growth methodCzochalski technique
Max. sizes, (mm)Ø150
Transmission range, (µm)
(Thickness 2 mm)
1.2 – 15.0
StructureCubic
Density (g/cm3)2.329
Melting point (°C)1410
Hardness (Mohs)7
Thermal expansion coefficient (10-6/K)2.3
Thermal conductivity (W m-1 K-1)147
Specific heat capacity (J kg-1K-1)
Solubility in water (g/100 cm3)0.005
Solubility in acidsSoluble
Solubility in organic solventsInsoluble
Wavelength (µm)
Refractive index
3.0
5.0
6.0
7.0
8.0
10.0
3.432
3.422
3.420
3.419
3.418
3.417
Absorption coefficient (cm-1)0.01 at 5 µm

Silicon for IR-range