What is "aluminium oxide"

alt. (context inorganic compound English) The solid, Al₂O₃, commonly known as alumina; it occurs as bauxite, sapphire, ruby and other forms; it is used in the manufacture of ceramics n. (context inorganic compound English) The solid, Al₂O₃, commonly known as alumina; it occurs as bauxite, sapphire, ruby and other forms; it is used in the manufacture of ceramics

n. any of various forms of aluminum oxide occurring naturally as corundum [syn: alumina, aluminum oxide]

Aluminium oxide is a chemical compound of aluminium and oxygen with the chemical formula . It is the most commonly occurring of several aluminium oxides, and specifically identified as aluminium(III) oxide. It is commonly called alumina, and may also be called aloxide, aloxite, or alundum depending on particular forms or applications. It occurs naturally in its crystalline polymorphic phase α-AlO as the mineral corundum, varieties of which form the precious gemstones ruby and sapphire. AlO is significant in its use to produce aluminium metal, as an abrasive owing to its hardness, and as a refractory material owing to its high melting point.

This page provides supplementary chemical data on aluminium oxide.

Aluminium(II) oxide or aluminium monoxide is a compound of aluminium and oxygen with the chemical formula AlO. It has been detected in the gas phase after explosion of aluminized grenades in the upper atmosphere and in stellar absorption spectra.

Aluminium(I) oxide is a compound of aluminium and oxygen with the chemical formula AlO. It can be prepared by heating the stable oxide AlO with elemental silicon at 1800 °C under vacuum.