Oxides | Weight (%) | |||
Site 1 | Site 2 | Site 3 | Site 4 | |
SiO2 | 75.18 | 74.94 | 75.01 | 75.95 |
TiO2 | 0.15 | 0.06 | 0.08 | 0.12 |
Al2O3 | 12.66 | 13.62 | 11.65 | 12.52 |
Fe2O3 | 1.91 | 0.95 | 1.95 | 1.02 |
MnO | 0.07 | 0.05 | 0.06 | 0.02 |
MgO | 0.22 | 0.07 | 0.14 | 0.15 |
CaO | 0.42 | 0.25 | 0.35 | 0.39 |
Na2O | 3.05 | 3.04 | 3.11 | 3.15 |
K2O | 4.73 | 5.23 | 5.54 | 4.87 |
P2O5 | 0.19 | 0.201 | 0.19 | 0.22 |
LOI | 0.68 | 1.18 | 1.01 | 0.99 |
Total | 99.28 | 99.58 | 99.03 | 99.38 |