PROPERTIES of Water-clear ZnS

MECHANICAL PROPERTIES
Young Modulus : 74.5 GPa
Knoop Hardness : 160 kg/mm2
Modulus of Rupture : 68 MPa at room temperature
: 160 MPa at 660°C
Poisson constant : 0.28
Density : 4.09 g/cm3

THERMAL PROPERTIES
Melting Point : 1830°C
Heat Capacity : 0.124 Cal/(g·°K)
Thermal Expansion Coefficient : 7.85 10-6 °C-1
Thermal Conductivity : 0,272 Wcm-1,K-1 at 27°C

OPTICAL PROPERTIES
Refraction Index at 20°C : 2.41279 at 0,5μm
: 2.33073 at 0,7μm
: 2,29165 at 1μm
: 2,25772 at 3μm
: 2.24661 at 5μm
: 2.22334 at 7μm
: 2,20084 at 8,20μm
: 2.18317 at 10,20μm