Table 1.
Chemical composition of the pumice determined by X-ray fluorescence.
| Oxides | wt.% |
|---|---|
| SiO2 | 70.97 |
| TiO2 | 00.14 |
| Al2O3 | 14.24 |
| MnO | 0.140 |
| MgO | 0.350 |
| Fe2O3 | 1.880 |
| CaO | 1.370 |
| Na2O | 4.460 |
| K2O | 4.020 |
| LOI | 2.410 |
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