Table 6. Chemical Composition of the Clay (Unit: %).
| Al2O3 | CaO | Fe2O3 | impurities | MgO | SiO2 | K2O |
|---|---|---|---|---|---|---|
| 35.38 | 1.96 | 2.04 | 8.34 | 0.34 | 49.86 | 2.08 |
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