Aluminium (aluminum in American and Canadian English with the symbol 13. It is a silvery-white, soft, non-magnetic metal. By mass, aluminium is the most abundant metal in the Earth's crust and the third most abundant element (after oxygen and silicon ). The abundance of aluminium decreases relative to other elements at greater depths into Earth's mantle and beyond. The chief ore of aluminium is bauxite. Aluminium metal is highly reactive, so native specimens environments. Instead, it is found combined in over 270 different minerals
Aluminium is remarkable for its low density and its ability to resist corrosion through the phenomenon of passivation are vital to the aerospace and important in transportation and building industries, such as building facades and window frames. and sulfates
Despite its prevalence in the environment, no living organism is known to use aluminium salts , but aluminium is well tolerated by plants and animals. Because of these salts' abundance, the potential for a biological role for them is of continuing interest, and studies continue.