| OPTICAL |
|
| |
Transmission Range |
0.17 to 5.5 microns |
| |
Refractive Index |
1.75449 (o) 1.74663 (e) at 1.06 microns |
| |
Reflection Loss |
at 1.06 µm (2 surfaces)
for o-ray – 11.7%; for e-ray – 14.2% |
| |
Index of Absorption |
0.3 x 10-3 cm-1 at 2.4µm |
| |
Restrahlen Peak |
13.5µm |
| |
dN/dT |
13.7 x 10-6 at 5.4µm |
| |
dN/dµ = 0 |
1.5µm |
| PHYSICAL |
|
| |
Density |
3.97 g/cm3 |
| |
Melting Point |
2040°C |
| |
Thermal Conductivity |
27.21 W/(m? K) at 300K |
| |
Thermal Expansion |
5.6 (paral) & 5.0 (perp) x 10-6/K |
| |
Hardness |
Knoop 2000 with 2000g indenter |
| |
Specific Heat Capacity |
419 J/(kg? K) |
| |
Dielectric Constant |
11.5 (paral) 9.4 (perp) at 1MHz |
| |
Young's Modulus (E) |
335 GPa |
| |
Shear Modulus (G) |
148.1 GPa |
| |
Bulk Modulus (K) |
240 GPa |
| |
Elastic Coefficients |
C11=496 C12=164 C13=115
C33=498 C44=148 |
| |
Apparent Elastic Limit |
275 MPa (40,000 psi) |
| |
Poisson Ratio |
0.25 |
| CHEMICAL |
|
| |
Solubility |
98? 10-6 g/100g water |
| |
Molecular Weight |
101.96 |
| |
Class/Structure |
Trigonal (hex), R3c |
