The developed database can be used for phase diagram and equilibrium solidification calculations for multicomponent systems. A set of optimized parameters for the thermodynamic models has been obtained which reproduces all available experimental data within theĮxperimental uncertainties from sub-solidus to above the liquidus temperatures at all compositions andĪ thermodynamic database for the oxyfluoride system CaO-MgO-Al2O3-SiO2-Na2O-K2O-Li2O-MnO-FeO-F has been developed based on the critical evaluation and optimization of all available experimental thermodynamic and phase diagram data. Spinel, olivine, pyroxene and melilite solid solutions are modelled using sublattice model based on the Compound Energy Formalism. The monoxide, wollastonite, α-Ca 2 SiO 4 and α’-Ca 2 SiO 4 solid solutions are described using the random mixing Bragg-Williams model. The Modified Quasichemical model is used to describe the GibbsĮnergy of the liquid slag. In addition, more recent important experimental data haveīeen available after previous assessments. Thermodynamic assessments of this system were previously published, however some of them were incomplete or described only limited range of compositions. Comprehensive literature review, critical re-assessment and thermodynamic re-optimization of phase diagramsĪnd thermodynamic properties of all phases have been carried out for the CaO–FeO–Fe2O3–SiO2 system.
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