Pre-Critical and Giant Post-Freezing and Pre-Melting Effects for Dielectric Properties in a Binary Mixture of Limited Miscibility

This report presents the results of dielectric studies in a nitrobenzene–decane critical mixture in the homogeneous liquid, biphasic mesophase, and the solid crystal phase. It focuses on detecting critical effects in the broad surrounding of the critical consolute temperature and pre-melting and post-freezing effects in the solid crystal phase. The strong manifestation of the diameter critical anomaly in the biphasic domain and the Mossotti catastrophe type pre-melting and post-freezing effects in the solid phase are evidenced. Studies include the puzzling low-frequency (LF) domain related to translational processes. The real part of electric conductivity, in LF limit, is well portrayed by the super-Arrhenius-type equation in the homogenous liquid and solid phases. The obtained experimental evidence can be significant for the cognitive progress of the still puzzling melting/freezing canonic discontinuous transition.The names of the individual files correspond to the numbering of the figures in the paper: Kalabiński J, Drozd-Rzoska A, Starzonek S, Rzoska SJ. Pre-Critical and Giant Post-Freezing and Pre-Melting Effects for Dielectric Properties in a Binary Mixture of Limited Miscibility. Crystals. 2024; 14(7):612. https://doi.org/10.3390/cryst14070612Files included in this collection:Figure 1A.txt and Figure 1B.txt - Frequency scans of the real and imaginary parts of dielectric permittivity in the homogeneous liquid, upper (decane-rich) coexisting phase in the biphasic domain, and the solid phase for selected temperaturesFigure 2A.txt and Figure 2B.txt - Frequency scans of the real and imaginary parts of dielectric permittivity in the homogeneous liquid, lower (nitrobenzene-rich) coexisting phase in the biphasic domain, and the solid phase for selected temperaturesFigure 3.txt - Dielectric constant changes in three phases of nitrobenzene–decane mixture of critical concentrationFigure 4.txt - Pre-transitional changes of dielectric constant in nitrobenzene–decane critical mixture in the homogeneous liquid phaseFigure 5.txt - The real part of dielectric permittivity for selected frequencies in the static and low-frequency (LF) domains for the lower phase (nitrobenzene-rich) of the nitrobenzene–decane critical mixtureFigure 6.txt - The pre-melting effect for the real part of dielectric permittivity for selected frequenciesFigure 7.txt - The behavior of the real part of electric conductivity in the liquid, biphasic, and solid domains of nitrobenzene–decane critical mixture