Oxide | B1 | B2 | B3 | B4 | B5 | B6 | B7 | B8 |
K2O | 1.26 | 1.19 | 1.13 | 1.23 | 1.16 | 1.19 | 1.15 | 1.18 |
P2O5 | 1.60 | 1.33 | 1.16 | 1.32 | 1.25 | 1.22 | 1.25 | 1.44 |
SiO2 | 45.68 | 44.87 | 45.45 | 45.89 | 45.30 | 45.19 | 45.33 | 45.55 |
CaO | 9.57 | 9.44 | 9.36 | 9.21 | 9.12 | 9.55 | 9.33 | 9.44 |
MgO | 9.69 | 9.88 | 9.25 | 9.57 | 9.44 | 9.34 | 9.65 | 9.09 |
Fe2O3 | 13.24 | 11.80 | 12.85 | 13.20 | 13.30 | 12.54 | 13.18 | 13.11 |
Al2O3 | 13.06 | 14.93 | 14.87 | 14.02 | 13.97 | 14.02 | 13.03 | 14.09 |
TiO2 | 2.08 | 2.02 | 2.05 | 1.95 | 1.98 | 2.05 | 1.98 | 2.08 |
MnO | 0.16 | 0.19 | 0.10 | 0.21 | 0.21 | 0.20 | 0.18 | 0.19 |
Na2O | 2.56 | 3.67 | 3.44 | 2.71 | 3.23 | 3.29 | 3.67 | 2.88 |
LOI | 1.10 | 0.63 | 0.34 | 0.69 | 0.14 | 1.41 | 0.28 | 0.95 |
Total | 99.97 | 99.95 | 100.00 | 100.00 | 99.10 | 100.00 | 99.03 | 99.97 |