Thermodynamic description of phase equilibrium in systems MCl₅–M^’Cl₅, (M = Nb, Ta, Mo, W, Re) and MCl₃–M^’Cl₃, (M = Ln)

Abstract

The paper considers the Saint-John-Bloch model and proves that this model is applicable for describing phase equilibrium in binary systems formed by pentachlorides of d-elements of groups V, Vl, Vll of the periodic system and lanthanide chlorides. The dependence of the possibility of forming solid solutions in LnCl3-Ln'Cl3 on the atomic number of a lanthanide was found.

Keywords

• saint-john-bloch diagram
• binary systems
• phase equilibrium
• lanthanides