Ternary Phase Diagram n-Docosane: n-Tricosane: n-Tetracosane Molecular Alloys at 293 K

Abstract

The ternary phase diagram of the mixtures n-C₂₂H₄₆: n-C₂₃H₄₈: n-C₂₄H₅₀ has been established at 293 K by X-ray diffraction experiments on forty one samples. This study indicates the existence of limited terminal solid solutions in the neighbourhood of three pure n-alkanes and three domains of intermediate phases, identical to those observed in the binary systems and denoted β‘₁, β^“ ₁, β^’ ₂ : on the basis of powder X-ray diffraction photographs, the patterns of the phases β^‘ ₁ and β^’2 are indistinguishable and these two intermediate solid solutions on both sides of the middle intermediate phase β^” ₁ are isostructural as in the binary systems.

Key Words:

• n-docosane
• n-tricosane
• n-tetracosane
• ternary phase diagram
• X-ray diffraction
• solid phases
• molecular alloys