2004/11/30 by A. Ciach, W. T. Góźdź, Wojciech T. Góźdź +1 · 1 citation
Chemistry · Materials Science · Physics and Astronomy · #Asymmetry #Charge (physics) #Condensed matter physics #Diffraction #Dilution #Electrostatics and Colloid Interactions #Ion #Ionic bonding #Lambda #Lattice (music) #Lattice constant #Material Dynamics and Properties #Mathematical physics #Mean field theory #Mesoscopic physics #Phase (matter) #Phase diagram #Physics #Quantum mechanics #Sigma #Spectroscopy and Quantum Chemical Studies #Thermodynamics #cond-mat.soft #cond-mat.stat-mech
paper · pdf · doi:10.1088/0953-8984/18/5/016
published as J. Phys. Cond. Matt. vol. 18, 1629 (2006)
arxiv created 2005/11/07 · openalex publication_date 2006/01/17 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
A mesoscopic theory for the primitive model of ionic systems is developed for arbitrary size, λ = σ + /σ − , and charge, Z = e + /| e − |, asymmetry. Our theory is an extension of the theory that we developed earlier for the restricted primitive model. The case of extreme asymmetries and is studied in some detail in a mean field approximation. The phase diagram and correlation functions are obtained in the asymptotic regime and , and for infinite dilution of the larger ions (volume fraction n p ∼1/ Z or less). We find a coexistence between a very dilute 'gas' phase and a crystalline phase in which the macroions form a bcc structure with the lattice constant ≈3.6σ + . Such coexistence was observed experimentally in deionized aqueous solutions of highly charged colloidal particles.