Al₂O₃Al2O3101.9600 g·mol⁻¹
Molar mass101.960 g·mol⁻¹calc 101.960 • Atomic weights: CIAAW 2021 (conventional atomic weights)
FormulaAl₂O₃Al2O3
Classoxide • ionicsolid
| Element | Count | Mass (g/mol) | Mass % |
|---|---|---|---|
| Al | 2 | 53.963 | 52.93% |
| O | 3 | 47.997 | 47.07% |
Physical properties
- State at STP
- solid
- Density
- 3.95 g·cm⁻³ (corundum at 20 °C, 1 atm)
- Melting point
- 2345 K (1 atm)
- Boiling point
- 3250 K (1 atm)
Structure & bonding
Al3+ in octahedral/tetrahedral oxide network; hard ceramic.
Occurrence & preparation
Bauxite ore via Bayer process; calcination gives alumina.
Uses
- Abrasive
- Ceramics
Safety
Low toxicity; dust irritates respiratory tract.
Consult current SDS. — consult current SDS before handling.