Abstract
From a structural consideration of the silicate melt, the free energy of solution and the components’ activities of melts of the MIO–MIIO–SiO2 type were evaluated. When a parameter is known as to each binary MIO–SiO2 or MIIO–SiO2 system (which has been discussed in the previous paper), the extension to the ternary system was found to be carried out without difficulty. A new scale of basicity of the silicate melt of this type was proposed.
