Abstract
The Tl-Sb-S system has been studied in the composition region Tl2S-Sb2S3-S using differential thermal analysis, X-ray diffraction, and emf measurements on thallium concentration cells at temperatures from 300 to 390 K, and the 300-K isothermal section of its phase diagram has been mapped out. The existence of the ternary compounds TlSb5S8, TlSb3S5, TlSbS3, TlSbS2, Tl3SbS4, and Tl3SbS3 has been confirmed, and the position of the phase fields involving these compounds has been accurately determined. Using emf data, we have evaluated the partial molar functions (\(\Delta \bar G\) , \(\Delta \bar H\) , \(\Delta \bar S\) ) of the thallium in the alloys studied, the standard thermodynamic functions of formation of the ternary compounds, and their standard entropies.
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