| Studied clay samples | ||
C1 | C2 | C3 | |
Chemical composition (wt.%) | |||
SiO2 | 57.28 | 65.81 | 58.70 |
Al2O3 | 14.36 | 12.29 | 14.40 |
Fe2O3 | 9.23 | 6.16 | 7.27 |
K2O | 3.64 | 4.10 | 3.67 |
MgO | 0.73 | 0.75 | 0.91 |
TiO2 | 1.40 | 1.09 | 1.40 |
P2O5 | 0.14 | 0.09 | 0.12 |
CaO | 1.05 | 1.31 | 2.61 |
Na2O | 1.08 | 1.26 | 1.04 |
MnO | 0.17 | 0.11 | 0.07 |
L.O.I | 10.92 | 7.03 | 9.81 |
Total | 100 | 100 | 100 |
SiO2/Al2O3 | 3.99 | 5.35 | 4.08 |
CaO + MgO + K2O + Na2O | 6.5 | 7.42 | 8.23 |
CIA | 71.33 | 64.82 | 62.30 |