Phase Equilibria in the Tl4PbTe3-Tl9SmTe6-Tl9BiTe6 Section of the Tl-Pb-Bi-Sm-Te System

Abstract

Phase equilibria in the section Tl4PbTe3-Tl9SmTe6-Tl9BiTe6 of the Tl-Pb-Bi-Sm-Te system were determined by combination of differential thermal analysis, powder X-ray diffraction methods as well as microhardness measurements. The phase diagrams of the boundary systems Tl4PbTe3-Tl9SmTe6, Tl9SmTe6-Tl9BiTe6, isothermal section at 820 and 840 K, some isopleth sections and as well as liquidus and solidus surfaces projections, were plotted. Unlimited solid solutions, which crystallize in Tl5Te3 structure type were found in the system at the solidus temperatures and below.

MODELING THE PHASE DIAGRAMS OF THE Tl9SmTe6–Tl4PbTe3 AND Tl9SmTe6–Tl9BiTe6 SYSTEMS

“…The obtained analytical dependences for the liquidus and solidus of the quasi-binary system (equations 1, 2) are shown in the captions of Figure 1 [27]. The curves are described by equations: Fig.2 symbols are experimental data [27]. The curves are described by equations:…”

“…The experimental data of [27] we used for modeling of the Tl 9 SmTe 6 (1)-2Tl 4 PbTe 3 (2) and Tl 9 SmTe 6 (1)-Tl 9 BiTe 6 (3) systems. According to the results of this work these systems are characterized by the formation of conti-nuous solid solutions (δ-phase) with the Tl 5 Te 3 structure.…”

“…In order to obtain new phases of variable composition with a structure of the Tl 5 Te 3 type, we studied phase equilibria in a number of systems consisting of Tl 5 Te 3 and its ternary analogs [27][28][29], in which continuous substitutional solid solutions were revealed. The constructed phase diagrams serve as the basis for choosing the composition of melts for growing single crystals of solid solutions with a given composition by directional crystallization.…”

Phase Equilibria in the Ag2Te-PbTe-Sb2Te3 System and Thermodynamic Properties of the (2PbTe)1-x(AgSbTe2)x Solid Solutions

“…[15][16][17][18][19] It is known that the development of new multicomponent materials is based on data on the phase equilibria of the corresponding systems and thermodynamic properties of phases formed in them. [20][21][22][23][24] Herein, we present the phase relationships in the Ag 2 Te-PbTe-Sb 2 Te 3 system over the entire concentration range. Also, we report the thermodynamic properties of the (2PbTe) 1-x (AgSbTe 2 ) x solid solution formed in the system.…”

Phase Equilibria in the MnGa2Tе4-MnIn2Tе4 System, Crystal Structure and Physical Properties of MnGaInTе4

“…18,19 For this case, the systems including compounds which are structural or formula analogs are the greatest interest since the formation of broad areas of substitutional solid solutions can be expected in them. [20][21][22][23][24] Herein, the phase equilibria in the MnGa 2 Tе 4 -Mn-In 2 Tе 4 system are studied, the crystal structures of the MnGaInTe 4 and MnIn 2 Te 4 are refined, as well as the EPR and Raman spectra for the MnGaInTe 4 crystals are measured, and the temperature dependences of the electrical conductivity and the Hall Effect of the MnGaInTe 4 are investigated.…”