Optical Properties
Transmission range in µm @10% min. 0.18 - 6.4
Transmission range in µm @50% min. 0.2 - 6.2
Refractive index @633nm 1.829
Reflection losses in % at 1 surface 7.9 @3µm
Reflection losses in % at 2 surfaces
dn/dT in 1/K 9.1· 10-6 @1064nm
Physical Properties
Density in g/cm³ 4.56
Melting point in °C 1950
Specific heat capacity in J/(kg · K) 628
Thermal Conductivity in W/(m · K) 13.1
Thermal Expansion in 1/K 7.8 · 10-6 (111)
7.7 · 10-6 (110)
8.2 · 10-6 (100)
Dielectric constant 7.75
Solubility in water in g/100g unsoluable
Mohs hardness 8 - 8.5
Knoop hardness in kg/mm² 1350<100>
Material type Single crystal, synthetic
Crystal type cubic
Crystal structure m3m
Lattice constant in Å a = 10
Elastic coeficients in GPa C11 = 333
C12 = 111
C44 = 114
Young's Modulus (E) in GPa 280
Shear Modulus (G) in GPa 113
Bulk Modulus (K) in GPa 180
Rupture Modulus in MPa 150
Apparent elastic limit in MPa 280
Poisson ratio 0.24
Spectral Properties