It is the third most abundant element in the Earth's crust, and is found primarily in bauxite ore in the form of aluminium oxide, with the chemical formula Al2O3. It is also referred to as alumina or aloxite.
When Aluminium is exposed to air, a thin oxidation layer is formed, which gives the metal its dull, silvery appearance. This layer provides the metal with excellent corrosion resistance and durability.
4Al + 3O2 -> 2Al2O3
The pure metal was first isolated by the German chemist Friedrich Wöhler (1800 - 1882) in 1827 as a fine powder. In 1845 he improved his process and succeeded in producing globules of the metal.