Experimental Activity of NaCl
data to be optimized
Experimental Liquid-Liquid enthalpy
of mixing data at 894¡ãC to be optimized
Experimental Phase Diagram data to be optimized

Create an empty solution file for every phase to optimize including all parameters you might use with the coefficients chosen to be zero;
Similarly, create a compound file for all pure compounds that you want to optimize using COMPOUND.

Select all species and solutions involved in the actual optimization. And do a dummy calculation in order to create an internal working file.

Optimization of experimented data to obtain model
parameters for the NaCl-SrCl2 liquid phase