Akademik Məlumat İdarəetmə Sistemi
Russian Journal of Inorganic Chemistry, vol.56, no.3, pp.442-449, 2011 (SCI-Expanded, Scopus)
The Tl-Te-Cl system was studied in the Tl-TlCl-Te composition region by differential thermal analysis, X-ray powder diffraction, and emf and microhardness measurements. A series of polythermal sec- tions, an isothermal section at 400 K, and a projection of the liquidus surface of the phase diagram were con- structed. The ternary compound Tl5Te2Cl characterized by a wide homogeneity region and incongruent melting by a syntectic reaction at 708 K was shown to exist. This compound was found to crystallize in tetragonal lattice (space group I4/mcm) with the parameters a = 8.921 Å, c = 12.692 Å, and Z = 4. Wide phase separation regions were also found in the system, including a three-phase separation region in the Tl-TlCl-Tl2Te sub- system. Regions of primary crystallization of phases, and the types and coordinates of in-and monovariant equilibria in the T-x-y diagram were determined. From emf measurement data, the standard thermody- namic functions of formation and the standard entropy were calculated for the compound Tl5Te2Cl, as follows: =ΔG0 298 355.9 ± 1.1 kJ/mol, =ΔH0 298 377.1 ± 5.0 kJ/mol, andΔS0 298 = 474.1 ± 6.8 J/(mol K). © Pleiades Publishing, Ltd., 2011.