Here the broken line encloses twenty- four black dots and thirty-six open circles and hence the composition is again A2O3 but the structure is irregular ... a simplified two- dimensional diagram, but the key mentions the term ion. ... each of these bears a negative charge which is neutralized by a positive charge on one of the cross-hatched circles (cations). ... them one extra oxygen ion when they are added to the glass as soda (sodium oxide, Na2O) or potash (potassium oxide, K2O).
|Title||:||Conservation of glass|
|Author||:||Roy G. Newton, Sandra Davison|
|Publisher||:||Butterworth-Heinemann - 1989-10|