四明山麦饭石:SiO270.07%,Al2O314.87%,Na2O4.26%,K2O3.94%,CaO2.14%,Fe2O31.42%,FeO1.27%,MgO0.70%,TiO20.34%,H2O0.29%,P2O50.09%,MnO0.06%