Advances in Materials Science and Engineering (Jan 2017)

Thermodynamic Study of Tl6SBr4 Compound and Some Regularities in Thermodynamic Properties of Thallium Chalcohalides

  • Dunya Mahammad Babanly,
  • Qorkhmaz Mansur Huseynov,
  • Ziya Saxaveddin Aliev,
  • Dilgam Babir Tagiyev,
  • Mahammad Baba Babanly

DOI
https://doi.org/10.1155/2017/5370289
Journal volume & issue
Vol. 2017

Abstract

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The solid-phase diagram of the Tl-TlBr-S system was clarified and the fundamental thermodynamic properties of Tl6SBr4 compound were studied on the basis of electromotive force (EMF) measurements of concentration cells relative to a thallium electrode. The EMF results were used to calculate the relative partial thermodynamic functions of thallium in alloys and the standard integral thermodynamic functions (-ΔfG0, -ΔfH0, and S0298) of Tl6SBr4 compound. All data regarding thermodynamic properties of thallium chalcogen-halides are generalized and comparatively analyzed. Consequently, certain regularities between thermodynamic functions of thallium chalcogen-halides and their binary constituents as well as degree of ionization (DI) of chemical bonding were revealed.