Oxides | Glass II | Glass Ш | ||||
Series | ||||||
а | b | c | а | b | c | |
SiO2 | 37.0 | 46.0 | 55.0 | 37.0 | 46.0 | 55.0 |
Al2O3 | 14.4 | 12.3 | 10.3 | 12.7 | 10.9 | 9.1 |
MgO | 9.9 | 8.5 | 7.1 | 7.3 | 6.2 | 5.2 |
CaO | 27.7 | 23.8 | 19.8 | 36.2 | 31.1 | 25.9 |
TiO2 | 7.2 | 6.1 | 5.1 | 2.1 | 1.8 | 1.5 |
Other oxides | 3.8 | 3.3 | 2.7 | 4.7 | 4.0 | 3.3 |
K | 1 | 1.45 | 2.12 | 0.84 | 1.25 | 1.79 |