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Thermodynamic Properties of Superionic Phase Ag4HgSe2I2 Determined by the EMF Method

Journal of Phase Equilibria and Diffusion volume 39, pages 11–16 (2018)Cite this article

Abstract

Triangulation of the Ag-Hg-Se-I system in the vicinity of quaternary phase Ag4HgSe2I2 was performed by differential thermal analysis, X-ray diffraction and electromotive force (EMF) methods. The spatial position of the phase region Ag4HgSe2I2-Se-HgI2 regarding the figurative point of silver was used to write the chemical reaction of formation of Ag4HgSe2I2. The EMF measurements were carried out by applying an electrochemical cell: (–) C|Ag|Ag2GeS3 glass|Ag4HgSe2I2, HgI2, Se|C (+), where C is graphite and Ag2GeS3 glass is the fast purely Ag+ ions conducting electrolyte. The linear dependence of the EMF of the electrochemical cell on temperature was used to determine the standard thermodynamic values of Ag4HgSe2I2 for the first time.

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Acknowledgments

The authors are grateful to the Johan Gadolin Scholarship programme and Academy of Finland for financial support. This work was carried out under the project “Thermodynamic investigation of complex inorganic material systems for improved renewable energy and metals production processes” as part of the activities of the Johan Gadolin Process Chemistry Centre at Åbo Akademi University.

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Authors and Affiliations

  1. Laboratory of Inorganic Chemistry, Johan Gadolin Process Chemistry Centre, Åbo Akademi University, Piispankatu 8, 20500, Turku, Finland

    Mykola Moroz & Fiseha Tesfaye

  2. Department of Chemistry and Physics, National University of Water and Environmental Engineering, Soborna 11, Rivne, 33028, Ukraine

    Mykola Moroz

  3. Department of Cartography and Geospatial Modeling, Lviv Polytechnic National University, S. Bandery 12, Lviv, 79013, Ukraine

    Myroslava Prokhorenko

  4. Center for Microelectronics and Nanotechnology, University of Rzeszow, Pigonia 1, 35959, Rzeszow, Poland

    Serhiy Prokhorenko

  5. Department of Physical and Colloid Chemistry, Ivan Franko National University of Lviv, Kyryla i Mefodiya 6, Lviv, 79005, Ukraine

    Oleksandr Reshetnyak

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  1. Mykola Moroz
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  2. Fiseha Tesfaye
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  3. Myroslava Prokhorenko
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  4. Serhiy Prokhorenko
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Correspondence to Mykola Moroz.

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Moroz, M., Tesfaye, F., Prokhorenko, M. et al. Thermodynamic Properties of Superionic Phase Ag4HgSe2I2 Determined by the EMF Method. J. Phase Equilib. Diffus. 39, 11–16 (2018). https://doi.org/10.1007/s11669-017-0602-3

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  • DOI: https://doi.org/10.1007/s11669-017-0602-3

Keywords

  • EMF method
  • phase equilibria
  • superionic compound
  • thermodynamic properties