| Crystal Class |
Hexagonal |
| |
Molecular Weight |
60.06 |
| |
Density |
2.635-2.660 g/cm3 at 289 K |
| |
Dielectric Constant
for 3x107 Hz at 295 K
|
35 microns |
| |
parallel |
4.27 |
| |
perpendicular |
4.34 |
| |
Reflection Loss |
at 2.05 µm (2 surfaces)
for o-ray – 8.3%; for e-ray – 8.5%; |
| |
Melting Temperature |
1740 K |
| |
Specific Heat |
0.17 cal/(g K) at 273 K |
| |
Knoop Hardness |
741 kg/mm2 |
| |
Transmission Range |
0.4 - 4.5 µm |
| |
Debye Temperature |
470 K |
| |
Thermal Conductivity |
|
| |
at 20 K (parallel/perpendicular) |
720/370 W/(m K) |
| |
at 194 K (parallel/perpendicular) |
20/10W/(m K) |
| |
at 323 K (parallel/perpendicular) |
10.7/6.2W/(m K) |
| |
Thermal Expansion |
|
| |
parallel |
8.0 x 10-6 1/K at 273-253 K |
| |
perpendicular |
13.4 x 10-6 1/K at 273-253 K |
| |
Young's Modulus |
|
| |
parallel |
97.2 GPa |
| |
perpendicular |
76.5 GPa |
| |
Bulk Modulus |
36.4 GPa |
| |
Shear Modulus |
31.14 GPa |
| |
Solubility in water |
None |
| |
Bangap |
8.4 |
