产 品 说 明
| Crystal Class | Thrigonal | |
| Space group | R3c | |
| Lattice constant | a=4,994A c=17,081A v=368,8 A3 | |
| Cleavage | Excellent following (1011) | |
| Molecular Weight | 100,09 | |
| Density | 2,711 g/cm3 at 289 K | |
| Reflection Loss | for two surfaces at 0.22 µm for o-ray - 16.9%; for e-ray – 9.2%; at 0.71 µm for o-ray – 11.7%; for e-ray – 7.4%; | |
| Decomposition Temperature | 1167 K | |
| Melting Temperature | 1612 K at 10,3 MPa | |
| Moh,s hardness scale | 3 | |
| Thermal Expansion | Parallel 25.1 x 10-6 1/K at 323 K Perpendicular 4,9 x 10-6 1/K at 323 K | |
| Transmission Range | 0,2-2,5 µm | |
| Elastic Constant | c11 13,17 x10 Din/cm c12 4,82 x10 Din/cm c13 5,68 x10 Din/cm c14 -2,0 x10 Din/cm c22 8,11 x10 Din/cm c44 3,5 x10 Din/cm | |
| Solubility in water | 0,0014 g/l at 298 K | |