<Tr> <Td_colspan="2"> <Ul> <Li> view </Li> <Li> talk </Li> <Li> </Li> </Ul> references in Wikidata </Td> </Tr> <Ul> <Li> view </Li> <Li> talk </Li> <Li> </Li> </Ul> <P> Aluminium or aluminum is a chemical element with symbol Al and atomic number 13 . It is a silvery - white, soft, nonmagnetic and ductile metal in the boron group . By mass, aluminium makes up about 8% of the Earth's crust; it is the third most abundant element after oxygen and silicon and the most abundant metal in the crust, though it is less common in the mantle below . The chief ore of aluminium is bauxite . Aluminium metal is so chemically reactive that native specimens are rare and limited to extreme reducing environments . Instead, it is found combined in over 270 different minerals . </P> <P> Aluminium is remarkable for its low density and its ability to resist corrosion through the phenomenon of passivation . Aluminium and its alloys are vital to the aerospace industry and important in transportation and building industries, such as building facades and window frames . The oxides and sulfates are the most useful compounds of aluminium . </P>

Where does aluminium come from in its raw form