Vauxite is a phosphate mineral with the chemical formula Fe²⁺Al₂(PO₄)₂(OH)₂·6. It belongs to the laueite – paravauxite group, paravauxite subgroup, although Mindat puts it as a member of the vantasselite Al₄(PO₄)₃(OH)₃·9H₂O group. Wikipedia