Phase equilibrium in the system Tl2Te-TlBr-TlI and thermodynamic properties of the solid solution Tl(5)Te(2)BrxI(1-x)статья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 19 ноября 2013 г.
Аннотация:The Tl2Te-TlBr-TlI system was investigated by means of the DTA and XRD analyses and microhardness and EMF measurements. Several polythermal and isothermal sections and the projection of the liquidus surface were constructed. The fields of primary crystallization, as well as types and coordinates of nonand monovariant equilibriums were determined. It was established that the system is characterized by formation of the continuous solid solution (c-phase) between the Tl5Te2Br and Tl5Te2I (Tl5Te3 structure type) iso-structural compounds. The homogeneity field of c-phase in the Tl5Te2Br-Tl5Te2I section penetrates the Tl2Te-Tl5Te2Br-Tl5Te2I subsystem and occupies its large part. The partial molar thermodynamic functions (Delta(G) over bar; Delta(H) over bar; Delta(S) over bar )of thallium were calculated for the Tl(5)Te(2)BrxI(1-x) (for x = 0.2; 0.4; 0.6; 0.8) solid solution based on the results of the EMF measurements. (C) 2013 Elsevier B.V. All rights reserved.