Coulombic and non-Coulombic contributions to the criticality of ionic fluids. An experimental approach

Weingärtner, Hermann; Kleemeier, Malte; Wiegand, Simone; Schröer, Wolffram

doi:10.1007/bf02183345

Cited by 90 publications

(69 citation statements)

References 67 publications

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“…6 the corresponding state phase diagrams for solutions in protic solvents get a lower critical solution point, while solutions in aprotic solvents including the KI/SO 2 system show an upper critical solution point as expected from the calculations of the RPM. Since lower critical solution points are typical for hydrophobic demixing, where breaking of hydrogen bonds of the solvent determines the separation [72], this indicates that such contributions are relevant for the phase transitions in alcohol solutions beside the Coulomb interactions. Notably, for solutions in aprotic solvents the corresponding state diagrams in RPM variables are well in agreement with that of the RPM.…”

Section: Experiments Determining the Nature Of The Critical Pointmentioning

confidence: 97%

“…At this stage the common opinion was that Coulomb phase transitions show mean-field behavior or may have a very small non-classical region [72]. The conservative expectation of a small non-classical region in Coulomb systems was supported by measurements of the turbidity in solutions of tetrabutylammonium picrate (N 4444 Pic) in various alcohols [73].…”

Section: Experiments Determining the Nature Of The Critical Pointmentioning

confidence: 99%

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A Short History of Phase Transitions in Ionic Fluids

Schröer

2012

Contrib. Plasma Phys.

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The paper reviews the development of theory and experiments concerning the nature of the critical point in ionic fluids. Because of the long-range nature of the Coulomb interactions the possibility of mean-field critical behaviour was discussed as a possibility. Although some experiments supported mean-field criticality, simulations on the model fluid of charged hard spheres and later experiments on ionic solutions have shown that phase transition of ionic systems belong to the Ising universality class like phase transitions in non-ionic fluids. Experiments concerning the crossover from Ising to mean field-behaviour are discussed as well as systematic differences between the phase behaviour predicted for the model fluid of charged hard spheres and that observed in ionic solutions.

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Section: Experiments Determining the Nature Of The Critical Pointmentioning

confidence: 97%

Section: Experiments Determining the Nature Of The Critical Pointmentioning

confidence: 99%

A Short History of Phase Transitions in Ionic Fluids

Schröer

2012

Contrib. Plasma Phys.

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“…This becomes particularly true when dealing with ionic fluids, i.e., fluids consisting of dissociated cations and anions, since in most cases the Coulomb interaction is the dominant interaction between the particles. Ionic mixtures have been intensely debated not only because of their interesting behavior (for recent reviews, see [1,2,3,4,5]), but also because a better understanding of such systems is the first step towards a more rigorous theoretical treatment of more complicated systems like charged colloids and polyelectrolytes.…”

Section: Introductionmentioning

confidence: 99%

Phase behavior of three-component ionic fluids

Moreira

Netz

2001

The European Physical Journal D

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Abstract. We study the phase behavior of solutions consisting of positive and negative ions of valence z to which a third ionic species of valence Z > z is added. Using a discretized Debye-Hückel theory, we analyze the phase behavior of such systems for different values of the ratioZ ≡ Z/z. We find, for Z > 1.934, a three-phase coexistence region and, forZ > 2, a closed (reentrant) coexistence loop at high temperatures. We characterize the behavior of these ternary ionic mixtures as function of charge asymmetry and temperature, and show the complete phase diagrams for the experimentally relevant cases ofZ = 2 andZ = 3, corresponding to addition of divalent and trivalent ions to monovalent ionic fluids, respectively. PACS

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“…The nature of the liquid-vapour critical point of ionxc systems is one of the outstanding problems in liquid state physics [1][2][3][4][5][6][7]. Computer simulations have played an important role in testing the quality of the various theoretical descriptions of the liquid-vapour coexistence curve [8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Solid-solid and liquid-solid phase equilibria for the restricted primitive model

SMIT¹

1996

Molecular Physics

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A Monte Carlo simulation study is made of the phase diagram of the restricted primitive model and of the solid-liquid and solid-solid phase coexistence curves in particular. At low temperatures, there is liquid-bcc coexistence and with increasing density there is bcc-fcc coexistence. These coexistence curves end in a triple point (liquid bcc-fcc above which only liquid-fcc coexistence is observed.

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Coulombic and non-Coulombic contributions to the criticality of ionic fluids. An experimental approach

Cited by 90 publications

References 67 publications

A Short History of Phase Transitions in Ionic Fluids

A Short History of Phase Transitions in Ionic Fluids

Phase behavior of three-component ionic fluids

Solid-solid and liquid-solid phase equilibria for the restricted primitive model

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