Calculation of the T-P phase diagrams for the halogenomethane compounds (CCl-=SUB=-4-n-=/SUB=-Br-=SUB=-n-=/SUB=-, n=0, 1, 2, 4) using the mean field theory -=SUP=-*-=/SUP=- | Zendy

H. Yurtseven | Zendy; Sonnur Işık | Zendy; Emel Kılıt Dogan | Zendy

Open Access

Calculation of the T-P phase diagrams for the halogenomethane compounds (CCl-=SUB=-4-n-=/SUB=-Br-=SUB=-n-=/SUB=-, n=0, 1, 2, 4) using the mean field theory -=SUP=-*-=/SUP=-

Author(s) -

H. Yurtseven,

Sonnur Işık,

Emel Kılıt Dogan

Publication year - 2019

Publication title -

физика твердого тела

Language(s) - English

Resource type - Journals

eISSN - 1726-7498

pISSN - 0367-3294

DOI - 10.21883/ftt.2019.02.47135.222

Subject(s) - monoclinic crystal system , phase diagram , trigonal crystal system , phase (matter) , field (mathematics) , mean field theory , thermodynamics , component (thermodynamics) , order (exchange) , phase transition , chemistry , diagram , crystallography , materials science , physics , mathematics , crystal structure , condensed matter physics , organic chemistry , statistics , finance , pure mathematics , economics

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.

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