Bauxite Wikipedia
20191028 ensp 0183 enspBauxite is a sedimentary rock with a relatively high aluminium content It is the world s main source of aluminium Bauxite consists mostly of the aluminium minerals gibbsite Al OH 3 boehmite γAlO OH and diaspore αAlO OH mixed with the two iron oxides goethite FeO OH and haematite Fe2O3 the aluminium clay mineral kaolinite