Acid‐Base Equilibria in the System PbO–SiO2

Abstract

The acid‐base equilibria in the liquid silicates in the system PbO–SiO2 are discussed, Data reported by Richardson and Webb, wherein the PbO activity is determined over a composition range of 0 to 60 mole % SiO2, are used for comparison with activities computed from structural models with consideration of the acid‐base equilibria. The results suggest that the liquid silicates in the system PbO–SiO2, for the composition and temperature ranges studied, are constituted of a relatively low number of anionic species and that these anions are of a relatively small size (i.e., O2–, SiO4–, (SiO3)36−. and (SiO2.5)66−).