EVOLUTION OF CHEMICAL FORMS OF DISSOLVED PARTICLES IN A SYSTEM CAF2-NACL-CACL2-H2O AT 800-DEGREES-C AND 2KBAR OF PRESSURE BY USAGE OF THERMODYNAMIC MODELING

Based on the electrostatic model of electrolite association the evalua tion of previously published experimental solubility data in a system CaF2(c)-NaCl-CaCl2-H2O at 800-degrees-C and 2 kbar of pressure was car ried out. The following associates are assumed to be formed: Na2ClF0, Na2CaF40 Ca2Cl3F0 and NaCaCl30. The first two chemical forms are presu mably alternative. The values of stability constants are evaluated. Th is approach is not completely valid for unequivocal conclusion of chem ical forms in a system. But in any case it can support the previously reported assumption on the formation of complex neutral particles of c ombined composition. This point could be considered as useful for the understanding of chemical state in electrolite solution at high thermo dynamic parameters.