| OPTICAL |
|
| |
Transmission Range |
0.11 to 7.5 microns |
| |
Refractive Index |
N0=1.3836 Ne=1.3957 at 0.405 microns |
| |
Reflection Loss |
at 0.200 µm (2 surfaces)
for o-ray – 5.9%; for e-ray – 6.2%; |
| |
Restrahlen Peak |
20 microns |
| |
dN/dT |
+2.3 and +1.7 x 10-6/ °C at 0.4 microns |
| PHYSICAL |
|
| |
Density |
3.177 g/cm3 |
| |
Melting Point |
1255 °C |
| |
Thermal Conductivity |
0.3 W/(m K) at 27 °C |
| |
Thermal Expansion |
13.7and 8.48 x 10-6/ °C |
| |
Hardness |
Knoop 415 kg/mm2 |
| |
Specific Heat Capacity, cal/(g K) |
|
| |
at 298 K |
0.24 |
| |
at 1700 K |
0.362 |
| |
Dielectric Constant |
4.87 parallel and 5.45 perpendicular |
| |
Young's Modulus (E) |
138.5 GPa |
| |
Shear Modulus (G) |
54.66 GPa |
| |
Bulk Modulus (K) |
101.32 GPa |
| |
Elastic Coefficients |
C11=140.2 C12=89.5 C44=56.8
C33=204.7 C13=62.9 C66=95.7 |
| |
Apparent Elastic Limit |
49.64 MPa |
| |
Poisson Ratio |
0.276 |
| CHEMICAL |
|
| |
Solubility |
<0.0002 g/100g water at 0 °C |
| |
Molecular Weight |
62.32 |
| |
Class/Structure |
Tetragonal, can cleave on C-axis |
