Synthesis, Thermodynamic Properties, and Structural Characteristics of Multicomponent Compounds in the Ag–Ni–Sn–S System

Mykola Moroz*, Fiseha Tesfaye, Pavlo Demchenko, Vasyl Kordan, Myroslava Prokhorenko, Oksana Mysina, Oleksandr Reshetnyak, Roman Gladyshevskii

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

To establish an accurate thermodynamic database of the Ag–Ni–Sn–S system, only a few experimental studies have been published. There is no published work with thermodynamic values of the quaternary compounds of the Ag–Ni–Sn–S system. Therefore, the main objective of this work was to determine the thermodynamic properties of multicomponent phases in the Ag–Ni–Sn–S system and to contribute new experimental thermodynamic data for the relatively better known phases in the temperature and compositional ranges that have not been studied experimentally before. To achieve these objectives, the T–x space of the Ag–Ni–Sn–S system in the region SnS–SnS 2–NiS 2–NiS–Ag 2S–SnS was studied by the x-ray phase diffraction and modified electromotive force (EMF) methods. The existence of the multicomponent compounds AgNiS 2, Ag 2NiS 2, Ag 2NiSnS 4, and Ag 2NiSn 3S 8 below 600 K was established. The synthesis was carried out in the positive electrodes of the electrochemical cells (ECCs). The values of standard thermodynamic functions of the compounds were determined from the temperature dependencies of the EMF of the ECCs. The crystal structure of the new modification of Ag 2NiSn 3S 8 compound was studied by x-ray diffraction analysis.

Original languageEnglish
Pages (from-to)1-18
Number of pages18
JournalJOM Journal of the Minerals, Metals and Materials Society
Volume75
Issue number5
DOIs
Publication statusPublished - Jun 2023
MoE publication typeA1 Journal article-refereed

Keywords

  • Gibbs energy
  • EMF technique
  • Renewable energy

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