An interpretation on the thermodynamic properties of liquid Pb-Te alloys
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TL;DR: In this article, the bonding character of liquid lead telluride PbTe is investigated in detail, by comparing the ionization energy of Pb \\text{Pb} atom, electron affinity of Te \text{Te} atom and the ionic bonding energy due to the cation Pb 2 + {\\text{pb}}^{2+} and anion Te 2 − {text{te}^{2-} with the help of structural information.
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Abstract: Abstract The bonding character of liquid lead telluride PbTe \\text{PbTe} is thermodynamically investigated in detail. Its possibility as an ionic melt composed of cation Pb 2 + {\\text{Pb}}^{2+} and anion Te 2 − {\\text{Te}}^{2-} is not acceptable, by comparing the ionization energy of Pb \\text{Pb} atom, electron affinity of Te \\text{Te} atom and the ionic bonding energy due to the cation Pb 2 + {\\text{Pb}}^{2+} and anion Te 2 − {\\text{Te}}^{2-} with the help of structural information. Solid lead telluride PbTe as a narrow band gap semiconductor might yield easily the overlapping of the tail of valence band and that of conduction one. And on melting, it becomes to an ill-conditioned metallic state, which concept is supported by the electrical behaviors of liquid Pb–Te alloys observed by the present authors. As structural information tells us about the partial remain of some sorts of covalent-type mono-dipole and poly-dipole of the molecule PbTe \\text{PbTe} , all systems are thermodynamically explained in terms of a mixture of these molecules and cations Pb 4 + {\\text{Pb}}^{4+} and Te 2 + {\\text{Te}}^{2+} and a small amount of the conduction electrons are set free from these elements based on the ternary solution model.
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Citations
Structural evidence of complex formation in liquid Pb-Te alloys
TL;DR: In this article, the authors used the Voronoi polyhedron to obtain the microscopic and spatial configurations of liquid Pb0.5Te 0.5 and showed that the mixture of some sorts of covalent-type formation of PbTe molecules and dissociated Pb and/or Te ions with conduction electrons.
Temperature-dependent mixing behavior of Pb–Sb alloys in liquid state
TL;DR: In this paper, the authors extended a computational model used to study the thermodynamic properties of binary liquid alloys to study chemical short-range order parameters and diffusion coefficients, and extended it to the case of binary alloys.
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Thermodynamic description of the Pb–Te system using ionic liquid model
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