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Egyptian Feldspar

CHEMICAL ANALYSIS FOR FELDSPAR   Constituents Result (%) SiO2 66.10 Al2O3 17.58 Fe2O3 0.05 CaO 0.09 MgO 0.05 So3 n.d. K2O 13.52 Na2O 2.15 TiO2 0.01 MnO 0.01 P2O5 0.01 CL n.d. TOTAL 99.57   Uses   1- Porcelain and utensils industry 2- The refractory industry 3- Glass industry 4- Electrical insulators industry 5- The manufacture of welding skewers