Constituent | Sample I % | Sample II % |
Total SiO2 | 72.37 | 73.50 |
Al2O3 | 11.97 | 12.50 |
Fe2O3 | 0.53 | 0.22 |
Na2O | 2.28 | 2.13 |
K2O | 8.38 | 9.30 |
MgO | 0.25 | 0.23 |