The CO2 solubilities of highly basic melts

The CO₂ solubilities of highly basic melts have been measured by equilibrating samples with a gas phase. According to the results, the investigated oxides can be arranged as follows in order of decreasing basicity; K₂O>Na₂O>Li₂O, BaO > CaO, SO₃ ? CrO₃ > BO_1.5 > SiO₂ > PO_2.5. By comparing the solubility data with optical theoretical basicity value, sulfide capacity, phosphate capacity and activity of CaO, it has been found that the carbonate capacity is a good measure of slag basicity.