@article {4198,
	title = {Gas-liquid coexistence and demixing in systems with highly directional pair potentials},
	journal = {Physical Review E},
	volume = {57},
	number = {5},
	year = {1998},
	note = {ISI Document Delivery No.: ZP583Times Cited: 19Cited Reference Count: 21Part B},
	month = {May},
	pages = {5682-5686},
	type = {Article},
	abstract = {Recent computer simulation studies strongly indicate that fluids of dipolar hard spheres do not display gas-isotropic liquid coexistence. In this paper we discuss a second example that also exhibits this rather unexpected behavior. This is a simple liquid-crystal model that we explore employing Gibbs ensemble Monte Carlo (GEMC) methods. It is shown that the system has clear gas-nematic liquid coexistence, but that the gas-isotropic liquid coexistence line is completely missing from the phase diagram. We attribute this to the highly directional nature of the attractive potential and argue that similar considerations are likely of relevance in the dipolar hard-sphere case as well. We also use GEMC techniques to investigate demixing in binary mixtures of neutral and dipolar hard spheres. For similar mixtures of neutral and charged have spheres, it is known that demixing is essentially condensation of the Coulombic fluid weakly influenced by the background of neutral hard spheres. Therefore, given that dipolar hard spheres do not condense, whether or not the present mixtures demix is an interesting question. In fact, demi?ring is observed and, moreover, the transition temperatures are in reasonable agreement with those predicted by the same integral equation theories that incorrectly predict condensation of the pure dipolar fluid. The critical temperature decreases rapidly with decreasing diameter of the neutral species consistent with the lack of gas-isotropic liquid coexistence for pure dipolar hard spheres. Clearly, for the present model demixing and dipolar condensation are not closely related phenomena as they are in the Coulombic systems. The neutral species appears to reduce the formation of dipolar "chains" or "clusters" that inhibit condensation of the purl dipolar hard-sphere fluid.},
	keywords = {COMPUTER-SIMULATION, CRYSTAL MODELS, DIPOLAR HARD-SPHERES, FLUID, GIBBS ENSEMBLE, INSTABILITY, MIXTURE, MONTE-CARLO, orientational order, PHASE},
	isbn = {1063-651X},
	url = {<Go to ISI>://000073768000025},
	author = {Blair, M. J. and Patey, G. N.}
}
@article {3184,
	title = {STABILITY OF BINARY-MIXTURES - SUPERSATURATION LIMITS OF AQUEOUS ALKALI-HALIDE SOLUTIONS},
	journal = {Journal of Chemical Physics},
	volume = {100},
	number = {5},
	year = {1994},
	note = {ISI Document Delivery No.: MY349Times Cited: 20Cited Reference Count: 38},
	month = {Mar},
	pages = {3827-3842},
	type = {Article},
	abstract = {The stability of ionic binary mixtures is investigated by an integral equation method. In presenting the theory a distinction is made between primary and secondary stability criteria, and this distinction is used to clarify some misconceptions in the literature. The derived stability criteria are then applied to electrolyte solutions as well as to a simple binary mixture. In a simple mixture of hard spheres in wafer, both mechanical and material instabilities are found near the spinodal line along with evidence of long-range hydrophobic forces. Results for the electrolyte solutions indicate that salts with only large ions, such as CsI, and those with a smaller ion, such as Na+ or K+, behave differently near the spinodal line. CsI acts hydrophobicly, and appears to undergo demixing from the solvent, whereas NaCl and KCl, which bind the solvent more tightly, do not show clear signs of any such demixing, but do appear to become mechanically unstable. Finally, some recent results of Chen and Forstmann [J. Chem; Phys. 97, 3696 (1992)] are discussed and applied to the present systems.},
	keywords = {DIPOLAR, ELECTROLYTE-SOLUTIONS, equation, FLUID MIXTURES, HYPERNETTED-CHAIN APPROXIMATION, INSTABILITY, NEUTRAL HARD-SPHERES, PHASE, SEPARATION, SPINODAL CURVE},
	isbn = {0021-9606},
	url = {<Go to ISI>://A1994MY34900047},
	author = {Ursenbach, C. P. and Patey, G. N.}
}
