Sources | SiO2 | Al2O3 | Fe2O3 | CaO | MgO | Na2O | K2O | P2O5 | LOI* |
[24] | 88.32 | 0.46 | 0.67 | 0.67 | 0.44 | - | 2.91 | - | 5.81 |
[28] | 92.08 | 0.11 | 0.05 | 0.78 | 0.49 | - | 3.50 | 1.35 | 1.83 |
[29] | 92.95 | 0.31 | 0.26 | 0.53 | 0.55 | 0.08 | 2.06 | - | 1.97 |
[23] | 86.49 | 0.01 | 0.91 | 0.50 | 0.13 | 0.05 | 2.70 | 0.69 | 8.83 |
[30] | 90.55 | 0.82 | 0.46 | 1.56 | 0.98 | 0.58 | 1.33 | - | 2.62 |