| Formula | Al2O3 |
| Crystal Growth | |
| Growth Method | Czochralski, Kyropoulos, Stepanov |
| Max. Diameter (inch) | Ø 4“ |
| Crystallographic Properties | |
| Crystal Structure Lattice Constant (nm) |
hexagonal a = 0.4758 c = 1.2991 |
| Physical Properties | |
| Color | colorless |
| Density (g/cm3) | 3.98 |
| Melting Point (K) | 2325 |
| Thermal Expansion (10-6K-1) | 6.7 ǁ c, 5.0 ⊥ c |
| Dielectric Constant | 11.5 ǁ c, 9.4 ⊥ c |
| Loss Tangent (@ 77K, 10GHz) | 3 x 10-8ǁ c, 8.6 x 10-8 ⊥ c |
| Hardness (Mohs) | 9 |
