Regularities of formation of binary intermetallic compounds between transition and non-transition elements

A four-parameter model based on the extended Miedema's cellular model of al loy phases and pattern recognition methods has been used to study the regul arities Of the formation of binary intermetallic compounds between transiti on element and non-transition element. The formation criterion can be expre ssed as some inequities of electronegativity phi, the valence electron dens ity in Wagner-Seitz cell n(ws)(1/3), Pauling's metallic radius R and the nu mber of valence electrons in atom Z or their functions. According to these empirical criterions, the "unknown" binary alloy system can be predicted, t he predicted result is better than that of Miedema's two-parameter model.