Formula ZnS
Growth method Chemical Vapor Deposition
Max. sizes, (mm) Ø180
Transmission range, (µm)
(Thickness 10 mm)
0.4 – 12.5
Structure cubic
Density (g/cm3) 4.09
Melting point (°C) 1830
Hardness (Mohs) 4.5
Thermal expansion coefficient (10-6/K) 6.5 @ 293K
Thermal conductivity (W m-1 K-1) 27.2
Thermal optical coefficient (10-6/K) 0.53
Solubility in water (g/100 cm3) insoluble
Solubility in acids unessential
Solubility in organic solvents insoluble
Wavelength (µm)
Refractive index
0.5
0.7
1.0
10
11
12
2.419
2.332
2.292
2.201
2.186
2.161
Absorption coefficient (cm-1) 0.001 at 2.7 µm
0.2 at 10 µm

Zinc sulfide for VIS and IR spectrum