| Element (%) | Clay samples | |||||
| YC 1 | YC2 | RC1 | RC2 | LC1 | LC2 | |
| LOI | 7.32 | 7.4 | 5.17 | 5.01 | 10.38 | 10.4 |
| SiO2 | 57.38 | 57.5 | 75.03 | 76.2 | 33.91 | 33.95 |
| Al2O3 | 20.36 | 20.1 | 12.6 | 12.8 | 17.07 | 18.01 |
| TiO2 | 1.11 | 1.1 | 0.68 | 0.54 | 0.77 | 0.76 |
| Fe2O3 | 9.1 | 9.8 | 5.98 | 5.04 | 37.08 | 36.09 |
| Mn2O3 | 0.16 | 0.17 | 0.04 | 0.05 | 0.06 | 0.05 |
| CaO | 0.13 | 0.15 | 0.01 | 0.01 | 0.11 | 0.12 |
| MgO | 1.07 | 1.05 | 0.21 | 0.19 | 0.21 | 0.2 |
| P2O5 | 0.32 | 0.4 | 0.14 | 0.15 | 0.31 | 0.35 |
| Total | 96.95 | 97.67 | 99.86 | 99.99 | 99.9 | 99.93 |
| Al2O3/SiO2 | 0.35 | 0.35 | 0.17 | 0.17 | 0.50 | 0.53 |