Structural study of Na2O-FeO-Fe2O3-P2O5 glasses by high-pressure liquid chromatography

Three series of Na2O-FeO-Fe2O3-P2O5 glasses with compositional ranges of 3.25 < O/P < 3.5 and 0 < Fe/P < 0.67 were prepared. Glass structure was studied using high-pressure liquid chromatography (HPLC). The average chain-length of phosphate anions decreases with increasing O/P ratios and glasses with similar O/P ratios and greater Fe/P ratios have wider distributions of phosphate anion lengths due to disproportionation reactions in the glass melts.