Ceramics-Silikáty 22, (2) 109 - 116 (1978)

The study was concerned with verifying the possibility of calculating the liquidus diagrams of eutectic ternary silicate systems containing anions with complex structures. The phase diagram calculation is based on knowledge of phase diagrams of the basic binary systems. The phase diagrams of binary systems serve for calculating excess functions defined as a difference between the actual and the “ideal” ones. It is assumed that the excess functions in a ternary system can be estimated in satisfactory approximation as a sum of contributions of the basic binary systems. The relations employed in the calculation of phase diagrams meet the general requirements holding for the courses of liquidus curves and surfaces.