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    D-48149 Münster
Optical and spectral properties
Transmission range in µm (minimum 10%)
0,12‐8,7
Transmission range in µm (minimum 50%)
0,12‐7,4
Refractive index @633nm
1,39126
Reflection losses in % at 1 surface
2,65 @633nm
Reflection losses, % for two surfaces
5,2 @600nm
dN/dT in 1/K
-16 · 10-6 @1,15µm
Physical properties
Density in g/cm3
2,639
Melting point in °C
848
Specific heat capacity in J/(kg · K)
1562
Thermal conductivity in W/(m · K)
11,3
Thermal expansion in 1/K
37 · 10-6
Dielectric constant
9
Solubility in water in g/100g
0,27 @18°C
Mohs hardness
4
Knoop hardness in kg/mm²
102
Material type
single crystalline, synthetic
Crystal type
cubic, face-centered, NaCl structure
Crystal structure
Fm3m
Lattice constant in Å
a = 4,02
Elastic coefficient in GPa
C11 = 112

C12 = 45,6

C42 = 63,2

Young's Modulus (E) in Gpa
64,79
Shear Modulus (G) in GPa
33,7
Bulk Modulus (K) in GPa
62,03
Rupture Modulus in MPa
10,9
Apparent elastic limit in MPa
11,2
Poisson's ratio
0,22
Spectral properties
sample thickness: 2 mm
Optical and spectral properties
Transmission range @10% min. 0,12 - 8,7
Transmission range @50% min. 0,12 - 7,4
Brechungsindex @ 633nm 1,39126
Reflection losses in % at 1 surface 2,65 @ 633nm
Reflection losses, % for two surfaces 5,2 @ 600nm
dn/dT in 1/K -16 · 10-6 @ 1,15µm
Physical properties
Density in g/cm³ 2,639
Melting point in °C 848
Specific heat capacity in J/(kg · K) 1562
Thermal conductivity in W/(m · K) 11,3
Thermal expansion in 1/K 37 · 10-6
Dielectric constant 9
Solubility in water in g/100g 0,27 @ 18°C
Mohs hardness 4
Knoop hardness in kg/mm² 102
Material type single crystalline, synthetic
Crystal type kubisch flächenzentriert, NaCl-Struktur
Crystal structure cF12
Lattice constant in Å a = 4,02
Elastic coefficient in GPa C11 = 112
C12 = 45,6
C44 = 63,2
Young's Modulus (E) in Gpa 64,79
Shear Modulus (G) in GPa 55,14
Bulk Modulus (K) in GPa 62,03
Rupture Modulus in MPa 10,9
Apparent elastic limit in MPa 11,2
Poisson's ratio 0,22
Spectral properties