Oxides Sites P2O5 MgO CaO K2O Na2O SiO2
S1 0 8.49 15.48 4.9 5.52 65.61
S2 20.5 4.04 38.51 1.16 2.36 31.98
S3 17.48 6.4 32.06 4.48 3.86 35.72
Table 11: Major oxides (%).