Aluminum Oxide

Al₂O₃

IUPAC: Aluminium oxide

CAS: 1344-28-1

Overview

Aluminum oxide (alumina) is an extremely hard ceramic material. Natural corundum, rubies, and sapphires are crystalline forms of Al₂O₃.

Composition

Element Symbol Atoms Atomic Mass
Oxygen O 3 15.9990
Aluminum Al 2 26.9820

Elemental Composition

O
Oxygen ×3
47.1%
Al
Aluminum ×2
52.9%

Uses

  • • Aluminum production
  • • Abrasives
  • • Ceramic insulators
  • • Gemstones

Fun Facts

  • ✦ Rubies and sapphires are Al₂O₃ crystals colored by trace impurities — chromium for rubies, iron/titanium for sapphires

Structure

SMILES

[O-2].[O-2].[O-2].[Al+3].[Al+3]

Properties

Type
oxide
State
solid
Molar Mass
101.96 g/mol
Density
3.9500 g/cm³
Melting Point
2072.0 °C
Boiling Point
2977.0 °C
Solubility
Insoluble

Molecular Descriptors

Exact Mass
101.9478
TPSA
3.0 Ų
H-Bond Donors
0
H-Bond Acceptors
3
Rotatable Bonds
0
Heavy Atoms
5
Complexity
0.0

Related Compounds

Antimony Trioxide

Sb₂O₃

Barium Oxide

BaO

Beryllium Oxide

BeO

Bismuth(III) Oxide

Bi₂O₃

Boron Trioxide

B₂O₃

Cadmium Oxide

CdO

Calcium Oxide

CaO

Carbon Dioxide

CO₂

Carbon Monoxide

CO

Cerium(IV) Oxide

CeO₂

Frequently Asked Questions

What is Aluminum Oxide?
Aluminum Oxide (Al₂O₃) is a oxide compound with the IUPAC name Aluminium oxide.
What is the molecular weight of Aluminum Oxide?
Aluminum Oxide has a molar mass of 101.96 g/mol.
What state is Aluminum Oxide at room temperature?
Aluminum Oxide is a solid at room temperature.
Is Aluminum Oxide organic or inorganic?
Aluminum Oxide is classified as an inorganic compound.
What elements make up Aluminum Oxide?
Aluminum Oxide (Al₂O₃) is composed of Oxygen (O), Aluminum (Al).