Borax is converted into crystalline boron by the following steps. Boraxx⟶H3BO3Heat⟶B2O3y⟶HeatB X & Y are respectively
Na2B4O7 + H2SO4+5H2O→Na2SO4 + 4H3BO3 2H3BO3Heat⟶B2O3+3H2O B2O3+2Al⟶2B+Al2O3