This article is cited in 1 paper

Phase transitions

Calculation of the $T$–$P$ phase diagrams for the halogenomethane compounds (CCl$_{4-n}$Br$_{n}$, $n$ = 0, 1, 2, 4) using the mean field theory

H. Yurtseven^a, S. B. Isik^a, E. Kilit Dogan<sup>b

a</sup> Department of Physics, Middle East Technical University, Ankara, Turkey
^b Department of Physics, Yuzuncu Yil University, Van, Turkey

Abstract: The $T$–$P$ phase diagrams of the halogenomethane compounds (CCl$_{4-n}$Br$_{n}$, $n$ = 0, 1, 2, 4) are calculated using a mean field model. By expanding the free energy in terms of the order parameters for the transitions of the liquid (L), rhombohedral (R), face-centered cubic (FCC) and monoclinic (M) phases in those compounds, the phase line equations are derived and they are fitted to the experimental data from the literature.
This method of calculating the $T$–$P$ phase diagram is satisfactory to explain the $T$–$P$ measurements for the halogenomethane compounds and it can also be applied to two-component systems.

Received: 27.06.2018

Language: English

DOI: 10.21883/FTT.2019.02.47135.222

 English version: Physics of the Solid State, 2019, 61:2, 201–206

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