Thermodynamic Properties of Terbium Tellurides

Abstract

The paper presents the results of a study of solid-phase equilibria in the Tb–Te system and the thermodynamic properties of terbium tellurides obtained by the methods of electromotive forces and X-ray diffraction analysis. Based on the experimental data, it was established that the TbTe, Tb2Te3, TbTe2 и TbTe3 compounds are formed in the system. For the investigations of the alloys from the two-phase regions TbTe3+Te, TbTe2+TbTe3, and Tb2Te3+TbTe2, the EMF of concentration cells relative to the TbTe electrode was measured. The EMF of concentration cells relative to the terbium electrode was measured for the TbTe+Tb2T3 region. The partial thermodynamic functions of TbTe and Tb in alloys were determined bycombining the EMF measurements of both types in the 300–450 K temperature range, based on which the standard thermodynamic functions of formation and standard entropies of the indicated terbium tellurides were calculated.
 
 
 
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“…In practice, the several modifications of the EMF method are used. In this case, liquid electrolytes [49][50][51], solid electrolytes [52,53], as well as ionic liquids can serve as an electrolyte [54,55]. Bulletin of the Karaganda University However, despite potential interest we did not find in the literature data on the thermodynamic properties of Tl9LnTe6 and TlLnX2 compounds.…”

Thermodynamic study of the thallium-thulium tellurides by EMF method

“…In practice, the several modifications of the EMF method are used. In this case, liquid electrolytes [49][50][51], solid electrolytes [52,53], as well as ionic liquids can serve as an electrolyte [54,55].…”