Virial coefficients and demixing of athermal nonadditive mixtures (Articolo in rivista)

Type
Label
  • Virial coefficients and demixing of athermal nonadditive mixtures (Articolo in rivista) (literal)
Anno
  • 2007-01-01T00:00:00+01:00 (literal)
Alternative label
  • Pellicane G. , F. Saija, C. Caccamo, P. V. Giaquinta (2007)
    Virial coefficients and demixing of athermal nonadditive mixtures
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Pellicane G. , F. Saija, C. Caccamo, P. V. Giaquinta (literal)
Pagina inizio
  • 4503 (literal)
Pagina fine
  • 4509 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 111 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Dip. di Fisica, Università di Messina CNR-Istituto Processi Chimico-Fisica, sede Messina (literal)
Titolo
  • Virial coefficients and demixing of athermal nonadditive mixtures (literal)
Abstract
  • We compute the fourth virial coefficient of a binary nonadditive, hard-sphere mixture over a wide range of deviations from diameter additivity and size ratios. Hinging on this knowledge, we build up a y expansion (Barboy, B.; Gelbart, W. N. J. Chem. Phys. 1979, 71, 3053) in order to trace the fluid-fluid coexistence lines, which we then compare with the available Gibbs-ensemble Monte Carlo data and with the estimates obtained through two refined integral-equation theories of the fluid state. We find that in a regime of moderately negative nonadditivity and largely asymmetric diameters, relevant to the modeling of sterically and electrostatically stabilized colloidal mixtures, the fluid-fluid critical point is unstable with respect to crystallization. (literal)
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