The vapor-liquid coexistence curve of Morse fluid was calculated within the integral equations approach. The critical point coordinates were estimated. The parameters of Morse potential, fitted for elastic constants in solid phase, were used here to apply the results of present calculations to the determination of iron binodal. The properties of copper and sodium were considered in an analogous way. The calculations of pair correlation functions and isobars at liquid phase have shown that only for sodium these potential parameters allow one to obtain agreement with the measurements data. For iron another parameters are necessary to get this agreement in liquid phase. However, they give rise to very low critical temperature and pressure with respect to the estimates of other authors. Consequently, one can suppose that Morse potential is possibly inapplicable to the calculation of high temperature properties of non-alkali metals in disordered phases.
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21 May 2011
Research Article|
May 18 2011
The calculation of vapor-liquid coexistence curve of Morse fluid: Application to iron
E. M. Apfelbaum
E. M. Apfelbaum
a)
Joint Institute for High Temperatures of Russian Academy of Sciences
, Izhorskaya 13 bldg. 2, Moscow 125412, Russia
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a)
Electronic mail: [email protected].
J. Chem. Phys. 134, 194506 (2011)
Article history
Received:
February 28 2011
Accepted:
April 22 2011
Citation
E. M. Apfelbaum; The calculation of vapor-liquid coexistence curve of Morse fluid: Application to iron. J. Chem. Phys. 21 May 2011; 134 (19): 194506. https://doi.org/10.1063/1.3590201
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