Phase compatibility in the systems CaO-SiO2-Fe2O3-SO3, CaO-Al2O3-Fe2O3-SO3and SiO2-Al2O3-Fe2O3-SO3

Three quaternary oxide systems C - S - F - (S) over bar(+), C - A - F - (S) over bar and S - A - F - (S) over bar are analysed for their subsolidus ph ase compatibility. The phase compatibility models of the particular systems are derived from the literature data as well as from the partial modelling of the phase compatibility relationships based on the geometrical consider ation and on the own theoretical discussion. Fifteen quaternary phase assem blages have been established in the system C - S - F - (S) over bar, twenty -three in the system C - A - F - (S) over bar and sir in the system S - A - F - (S) over bar respectively, which define the entire phase space of the analysed systems.