Major oxides | B1 (%) | B2 (%) | B3 (%) |
SiO2 | 52.4 | 47.3 | 43.9 |
Al2O3 | 34.2 | 36.5 | 29.2 |
Na2O | 0.32 | 0.4 | 3.13 |
K2O | 8.1 | 6.03 | 18.36 |
MgO | 0.14 | 0.11 | ND |
CaO | 0.21 | 0.23 | ND |
TiO2 | 1.073 | 1.082 | 1.075 |
MnO | 0.019 | 0.03 | 0.026 |
Fe2O3 | 0.09 | 0.02 | 0.16 |
P2O5 | ND | 0.01 | 0.011 |
L.O.I. | 3.04 | 3.49 | 3.98 |