The dissolution enthalpy at 298.15 K of intermediate compounds in LnBr₃-MBr systems: CALPHAD reassessment of thermodynamics of LnBr₃-MBr systems (Ln = Ce, Pr, M = K-Cs)

期刊论文
出版模式：

开放获取
发表日期：

2025年7月8日

查看全文

Beata Salamon-Baran,
Jan Kapała,
Leszek Rycerz

摘要

The dissolution enthalpies of intermediate compounds in LnBr₃-MBr (Ln = Ce, Pr, M = K-Cs) systems were measured at 298.15 K using the Calvet calorimeter. The formation enthalpies of K₂CeBr₅, Rb₂CeBr₅, Rb₃CeBr₆, RbCe₂Br₇, Cs₃CeBr₆, CsCe₂Br₇, K₂PrBr₅, Rb₂PrBr₅, RbPr₂Br₇, Cs₃PrBr₆, and CsPr₂Br₇ were calculated from the enthalpies of dissolution of the corresponding system components. The phase diagrams of LnBr₃-MBr systems were reassessed using the CALPHAD method by applying a uniform Associate Solution Model of the liquid phase. The stability of the compounds resulting from CALPHAD modelling was analysed. Enthalpies of the formation of compounds values obtained by solution calorimetry were compared with values obtained by extrapolating CALPHAD results.

The dissolution enthalpy at 298.15 K of intermediate compounds in LnBr3-MBr systems: CALPHAD reassessment of thermodynamics of LnBr3-MBr systems (Ln = Ce, Pr, M = K-Cs)

摘要

The dissolution enthalpy at 298.15 K of intermediate compounds in LnBr₃-MBr systems: CALPHAD reassessment of thermodynamics of LnBr₃-MBr systems (Ln = Ce, Pr, M = K-Cs)