铝(Al2O3)35.7%,白度90.7,烧失11.3%,铁(Fe2O3)0.21%,钙(CaO)0.25%,镁(MgO)0.13%,钛(Ti2O)0.01%,钾(K2O)2.46%,钠(Na2O)0.06%,硅(SiO2)49.78%