Granite Chemical Properties

Granite is primarily composed of feldspar, quartz along with various other minerals in varying percentage,which are stated as follows:

 

Nominal chemical composition of various oxides
Silica(SiO2) ---------------------- 70-77%
Alumina(Al2O3) ----------------- 11- 14%
Potassium Oxide(P2O5) --------- 3 – 5%
Soda(Na2O) ------------------------ 3 – 5%
Lime ----------------------------------- 1%
Iron(Fe2O3) -------------------------- 1-2%
Iron(FeO) ----------------------------- 1 – 3%
Magnesia(Mg0) ------------------------- .5 – 1%
Titina ---------------------------------- Less than 1%(.38%)
Water(H2O) --------------------------- 0.03%