Crystal properties
Crystal Type	cubic, diamond structure	Diced Silicon substrat
Transmission Range	1.2 ... 15 µm
Refractive Index	3.4179 @ 10 µm
Reflective Loss	46.1 % @ 10 µm
Density.	2.3291 g/cm3
Melting Point:	1420 °C
Molecular Weight:	28.086
Thermal Conductivity	163.32 W / (m K)
Specific Heat	703.4 J / (kg K) @ 25 °C
Thermal Expansion.	4.05 × 10–6 / K @ 10...50 °C
Hardness (Knoop)	1150 (Mohs 7)
Young’s Modulus	131 GPa
Shear Modulus	79.9 GPa
Bulk Modulus	102 GPa
Rupture Modulus	340 MPa
Elastic Coefficien	C11 = 167 / C12 = 65 / C44 = 80 Gpa
Dielectric Constant	13 @ f = 9.37 GHz
Solubility in Water	Insoluble
Crystal Structure	single crystal
Cleavage Planes	None
Application	material for IR optic and Electronics
List of optical crystals