A new method to estimate the atomic volume of ternary intermetallic compounds

The atomic volume of an AxByCz ternary intermetallic compound can be calculated starting from volumes of some proper A–B, A–C and B–C binary phases. The three methods by Colinet, Muggianu and Kohler, originally used to estimate thermodynamic quantities, and a new method here proposed, were tested to derive volume data in eight systems containing 91 ternary phases with the known structure. The comparison between experimental and calculated volume values shows the best agreement both for the Kohler method and for the new proposed procedure.