Thermodynamic properties of equilibrium phases in the Ag-Cu-S system below 500 K: Experimental study

Fiseha Tesfaye, Pekka Taskinen

Research output: Chapter in Book/Conference proceedingConference contributionScientificpeer-review

1 Citation (Scopus)

Abstract

Thermodynamics of the equilibrium phase assemblage Ag0.9Cu 1.1S-Cu2-xS-CuS have been studied by an EMF-method. The ternary phase was synthesized from the pure Cu2S and Ag2S in vacuum furnace at high-temperature and mixed with appropriate compositions of Cu2S and CuS to form the cathode electrode. The EMF-measurements were made on the solid-state galvanic cell Pt(-) | Ag | RbAg4I 5 | Ag0.9Cu1.1S-Cu2-xS-CuS | Pt(+), in a temperature range from 316 K to 498 K. Based on the measured EMF vs. T relations, thermodynamic functions (ΔfG°, Delta;fS° and Delta;fH°) of stromeyerite (Ag 0.9Cu1.1S) in equilibrium with Cu2-xS and CuS have been determined. The obtained experimental values have been compared with the available literature values. New experimentally determined thermodynamic properties of the solid solution (Ag,Cu)2Sss were determined.

Original languageEnglish
Title of host publicationEPD Congress 2014 - Held During TMS 2014 143rd Annual Meeting and Exhibition
PublisherMinerals, metals and materials society
Pages185-194
Number of pages10
ISBN (Print)9781118889763
DOIs
Publication statusPublished - 2014
MoE publication typeA4 Article in a conference publication
EventEPD Congress 2014 - TMS 2014 143rd Annual Meeting and Exhibition - San Diego, CA, United States
Duration: 16 Feb 201420 Feb 2014

Publication series

NameTMS Annual Meeting

Conference

ConferenceEPD Congress 2014 - TMS 2014 143rd Annual Meeting and Exhibition
CountryUnited States
CitySan Diego, CA
Period16/02/1420/02/14

Keywords

  • Electrochemistry
  • Gibbs energy
  • Solid solution
  • Stromeyerite

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