Features:

Transmission Range 1.2-15μm; 17…>500μm 
Refractive Index 3.41776 when 10μm 
Reflective Loss 46.1% when 10μm 
Density 2.3291g/cm 
Melting Point 1414℃ 
Molecular Weight 28.09 
Thermal Conductivity 163.32 W/(m K) when 40℃ 
Specifics Heat 703.4J/(kg K) 
Thermal Expansion 3.9ⅹ10 /℃ when 200-300 K<111> 
Hardness (mohs) 1150(Mohs 7) 
Young's Modulus 131GPa 
Shear Modulus 79.9GPa 
Bulk Modulus 102GPa 
Rupture Modulus 125MPa 
Dielectric Constant 13 when f=9.37GHz 
Solubility Water insoluble 
Crystal Structure Single crystal, synthetic 
Cleavage Planes (111) 

Specifications:

Standard Diameter from 10mm to 300mm
Standard Thickness from 1mm to 30mm

Applications:

 Windows, lenses, band pass filter, thermography, ATR crystals, FIR optics, mirrors