Chemical composition of glauconite clay (G) mineral.
| Constituent | Content (wt%) |
|---|---|
| SiO2 | 50.50 |
| Al2O3 | 7.88 |
| Fe2O3 | 20.88 |
| MgO | 2.81 |
| CaO | 0.34 |
| P2O5 | 0.38 |
| K2O | 5.00 |
| SO3 | 1.2 |
| Na2O | 0.95 |
| Loss-on-ignition | 9.70 |
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