Structural Features of K2O-SiO2 Melts: Modeling and High-Temperature Experiments

Despite numerous investigations, the thermodynamic properties of potassium silicates remain apparently contradictory. In situ experiments are complicated by unstable behavior a K2O–SiO2 melt in region compositions with high oxide content. this paper, we study structure melts method physicochemical modeling, taking into account results high-temperature Raman spectroscopy. To do this, spectra were curve-fitted, second coordination sphere silicon atoms. From interpretation glasses and having K2O content up to 55 mol.%, quantitative characteristics system obtained. Since available information on is known be contradictory, coordinated silicates, some which evaluated, used as input data for modeling. Structural modeling was carried out across range 60 mol.% oxide. The database structural units silicate system, updated according experimental data, will find practical application chemistry, geochemistry engineering fields.