Journal
RUSSIAN JOURNAL OF ELECTROCHEMISTRY
Volume 51, Issue 9, Pages 886-889Publisher
PLEIADES PUBLISHING INC
DOI: 10.1134/S1023193515090098
Keywords
Ag3SBr superionic phase; EMF technique; thermodynamic functions
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Triangulation of the Ag-S-Br system in the Ag-S-AgBr section is carried out using the methods of physico-chemical analysis. The temperature dependence of EMF of the electrochemical cell of C|Ag|Ag3GeS3Br|D|C glass is studied in the range of 340-430 K (C are inert (graphite) electrodes; Ag, D are the cell electrodes; D is the equilibrium composition of the Ag3SBr-S-AgBr phase region; Ag3GeS3Br glass is the membrane with purely ionic (Ag+) conductivity). Equations E(T) are used to calculate the values of thermodynamic functions of the Ag3SBr phase that is in equilibrium with silver bromide and sulfur (T < 379.34 K) and in equilibrium with silver bromide and the liquid phase (T > 379.34 K). The values of thermodynamic functions of phases Ag3SI, Ag3SBr, and Ag3TeBr in the standard state are compared. The effect of chalcogen a dagger chalcogen and halogen a dagger halogen replacement in the anionic sublattice on the values of thermodynamic functions of phases is analyzed.
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