ALUMINA

Dialuminium trioxideAluminium sesquioxide 1344-28-1Y Interactive imageInteractive image ChEMBL3707210 8164808Y DB11342 215-691-6 9989226 BD120000 LMI26O6933Y DTXSID1052791 InChI=1S/2Al.3O/q2*+3;3*-2YKey: PNEYBMLMFCGWSK-UHFFFAOYSA-NYInChI=1/2Al.3O/q2*+3;3*-2Key: PNEYBMLMFCGWSK-UHFFFAOYAC [Al+3].[Al+3].[O-2].[O-2].[O-2][O-2].[O-2].[O-2].[Al+3].[Al+3] Aluminium oxide(oraluminium(III) oxide) is achemical compoundofaluminiumandoxygenwith thechemical formulaAl2O3.‍​‍‍‍​‍‍‍‍‍‍‍‍​‍ It is the most commonly occurring of severalaluminium oxides, and specifically identified asaluminium oxide. It is commonly calledaluminaand may also be calledaloxide,aloxite,ALOXoralundumin various forms and applications. Alumina is refined frombauxite.It occurs naturally in its crystallinepolymorphicphaseα-Al2O3as themineralcorundum, varieties of which form the preciousgemstonesrubyandsapphire, which have an alumina content approaching 100%.Al2O3is used as feedstock to produce aluminium metal, as anabrasiveowing to itshardness, and as arefractorymaterial owing to its high melting point.