Sample No | (Fe2O3 + MgO) | Na2O | K2O |
1 | 68.4 | 17.7 | 13.7 |
2 | 53.2 | 4.0 | 42.6 |
3 | 48.1 | 11.4 | 40.4 |
4 | 67.4 | 16.5 | 16.0 |
5 | 92.6 | 7.2 | 0.08 |