Phase diagram of NdI3–RbI pseudo-binary system. Thermodynamic properties of solid compounds

Beata Salamon , Leszek Rycerz , Jan Kapała , Marcelle Gaune-Escard


Phase equilibria in the NdI3–RbI binary system were established from differential scanning calorimetry (DSC) measurements. This system exhibits three compounds, namely Rb3NdI6, Rb2NdI5 and RbNd2I7, and two eutectics located at NdI3 molar fractions x = 0.177 (T = 810 K) and x = 0.421 (T = 706 K), respectively. Rb3NdI6 undergoes a solid–solid phase transition at 718 K and melts congruently at 905 K. Rb2NdI5 and RbNd2I7 melt incongruently at 711 K and 737 K, respectively. The heat capacity of solid and liquid Rb3NdI6 has been measured in temperature range 298–1006 K. The all of accessible data were used for optimization of phase diagram by the CALPHAD method. Liquid model of associated solution with one associate has been used for description of the liquid phase. The dependence of mixing entropy on composition were determined and interpreted. For the pseudo-binary compounds, existing in investigated system, dependence of Gibbs energies of formation on temperature were calculated.
Author Beata Salamon (EaE / IChaFT / DNCh)
Beata Salamon,,
- Department of Non-organic Chemistry
, Leszek Rycerz - Wrocław University of Science and Technology (PWr)
Leszek Rycerz,,
, Jan Kapała - Wrocław University of Science and Technology (PWr)
Jan Kapała,,
, Marcelle Gaune-Escard - Institut Universitaire des Systemes Thermiques Industriels/CNRS
Marcelle Gaune-Escard,,
Journal seriesFluid Phase Equilibria, ISSN 0378-3812, e-ISSN 1879-0224, (A 30 pkt)
Issue year2015
Publication size in sheets0.4
ASJC Classification1606 Physical and Theoretical Chemistry; 3100 General Physics and Astronomy; 1500 General Chemical Engineering
Languageen angielski
Score (nominal)30
Score sourcejournalList
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2015 = 0.998; WoS Impact Factor: 2015 = 1.846 (2) - 2015=1.987 (5)
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