Abstract

Two simplified variants of a dusty, condensed dispersed phase and colloid plasmas models are considered as a thermodynamically equilibrium combination of classical Coulomb particles: a 2-component electroneutral system of macro- and micro-ions (+Z, – 1) and a 3-component electroneutral mixture of macro-ions and two kinds of micro-ions (+Z, –1, +1). The base for a consideration is a phase diagram of dusty plasma by Hamaguchi et al (1997 Phys. Rev. E 56 4671) for an equilibrium charged system with the Yukawa potential. Parameters of a splitting the one-dimensional melting boundaries of the Hamaguchi diagram (i.e. hypothetical melting density gap between separate freezing liquid line (liquidus) and melting crystal line (solidus)) are discussed. Estimation of a density gap value is made. Additional splitting of all phase boundaries in the three-component model because of so-called non-congruency of all phase transitions in this model is discussed also.

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