Optische Eigenschaften
Transmissionsbereich in µm (Minimum 10%)
0,12‐9,6
Transmissionsbereich in µm (Minimum 50%)
0,12‐8,5
Brechungsindex @633nm
1,375 (no)

1,389 (nao)

Reflexionsverluste in % an 1 Oberfläche
2,52 @633nm
Reflexionsverluste in % an 2 Oberflächen
11,2 @120nm
dN/dT in 1/K
2,3 · 10-6 (parallel)

1,7 · 10-6 (senkrecht)

@400nm

Physikalische Eigenschaften
Dichte in g/cm3
3,177
Schmelzpunkt in °C
1255
Spezifische Wärmekapazität in J/(kg · K)
1004
Thermische Leitfähigkeit in W/(m · K)
21 (parallel)

33,6 (senkrecht)

@300K

Thermische Ausdehnung in 1/K
13,7 · 10-6 (parallel)

8,9 · 10-6 (senkrecht)

Dielektische Konstante
4,87 (parallel)

5,45 (senkrecht)

Wasserlöslichkeit in g/100g
2 · 10-4 @0-60°C
Mohs-Härte
6
Knoop-Härte in kg/mm²
415
Materialtyp
Einkristall, synthetisch
Kristalltyp
tetragonal
Kristallstruktur
tP6
Gitterkonstante in Å
a = 4,0623

c = 3,053

Elastizitätskonstanten in GPa
C11 = 138

C12 = 88

C13 = 62

C33 = 201

C44 = 56,5

C66 = 98,6

Elastizitätsmodul (E) in GPa
138,55
Schubmodul (G) in GPa
54,66
Kompressionsmodul (K) in GPa
101,32
Biegefestigkeit in MPa
60
Dehnungsgrenze in MPa
49,6
Poissonzahl
0,276
Spektrale Eigenschaften
Probendicke: 2 mm
Optical Properties
Transmission range in µm @10% min. 0.12 - 9.6
Transmission range in µm @50% min. 0.12 - 8.5
Refractive index @ 633nm 1.375 (no)
1.389 (neo)
Reflection losses in % at 1 surface 2.52 @ 633nm
Reflection losses in % at 2 surfaces 11.2 @ 120nm
dn/dT in 1/K 2.3 · 10-6 (parallel c-axis)
1.7 · 10-6 (perpendicular c-axis)
Physical Properties
Density in g/cm³ 3.177
Melting point in °C 1255
Specific heat capacity in J/(kg · K) 1004
Thermal Conductivity in W/(m · K) 21 (parallel) @300K
33.6 (perpendicular) @300K
Thermal Expansion in 1/K 13.7 · 10-6 (parallel)
8.9 · 10-6 (perpendicular)
Dielectric constant 4.87 (parallel)
5.45 (perpendicular)
Solubility in water in g/100g 2 · 10-4 @ 0-60°C
Mohs hardness 6
Knoop hardness in kg/mm² 415
Material type Single crystal, synthetic
Crystal type tetragonal
Crystal structure tP6
Lattice constant in Å a = 4.0623
c = 3.053
Elastic coeficients in GPa C11 = 138
C12 = 88
C13 = 62
C33 = 301
C44 = 56.5
C66 = 95.5
Young's Modulus (E) in GPa 138.55
Shear Modulus (G) in GPa 54.66
Bulk Modulus (K) in GPa 101.32
Rupture Modulus in MPa 60
Apparent elastic limit in MPa 49.6
Poisson ratio 0.276
Spectral Properties