InChI=1/Al.2O/rAlO₂/c2-1-3
Formula weight: 101.96 amu
Melting point: 2303 K
Boiling point: 3250 K
True density: 3.97 g/cm3
Bulk density: 0.85 g/mL (325 mesh ~ 0) 0.9 g/mL (120 mesh ~ 325 mesh)
Crystal structure: Trigonal system (hex)
Solubility: insoluble in water at room temperature
Conductivity: non-conductive at room temperature
Al₂O₃ is an ionic crystal
Thermochemical properties:
ΔfH0liquid 1620.57 kJ/mol
ΔfH0solid 1675.69 kJ/mol
S0liquid, 1 bar 67.24 J/mol·K
S0solid 50.9 J/mol·K