Optical properties
Transmission range
320 ‐ 5600
Refractive index @1300 nm
ne=2,146

no=2,220

Reflection losses in % at 1 surface @ 633 nm
14,6
optical homogeneity in 1/cm
5·10-5
NLO coefficients in pm/V
d33= 34,40

d31=d15= 5,95

d22= 3,07

Damage threshold in MW/cm2 (10ns)
300
Absorption loss in %/cm @1064 nm
< 0,1
Physical properties
Density in g/cm3
4,64
Melting point in °C
1253
Specific heat capacity in J/(kg · K)
628
Thermal conductivity in W/(m · K) @25°C
4,19 (⊥ c-axis)

4,6 (∥ c-axis)

Thermal expansion in 1/K @25°C
14,8 · 10-6 (⊥ c-axis)

4,1 · 10-6 (∥ c-axis)

Dielectric constant @298K, 100kH
82
Solubility in water in g/100g
insoluble
Mohs hardness
5
Knoop hardness in kg/mm²
630
Material type
single crystalline, synthetic
Crystal structure
hexagonal
Lattice constants in Å
a = 5,15

c = 13,86

Elastic coefficient in GPa
C11 = 202

C12 = 55

C13 = 71

C14 = 8,3

C33 = 242

C44 = 60,1

Young's Modulus (E) in Gpa
170
Shear Modulus (G) in GPa
68
Bulk Modulus (K) in GPa
112
Poisson's ratio
0,25
Spectral properties