ABSTRACT

The numerical values on the standard thermodynamic functions of AuSe were determined by the electromotive force (EMF) method in a solid-state galvanic cell with a superionic conductor AgI as the solid electrolyte. According to the experimental data on the EMF vs. temperature, the analytical equations for Gibbs free energy, enthalpy and entropy were obtained for the single stable polymorphic form of AuSe. The temperature-dependent relationships of Gibbs free energy of formation of AuSe and the standard thermodynamic functions of compounds within the temperature range (400 to 700) K were also evaluated. No [alpha]-[beta] transformation was identified in the gold saturation and [beta]-form is a metastable modification of AuSe.

Compounds

#	Formula	Name
1	Au	gold
2	Ag3AuSe2	gold silver selenide (AuAg3Se2)
3	AuSe	gold selenide (AuSe)
4	Se	selenium
5	Ag	silver

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Phase	Method	#Points
POMD	2	Triple point temperature, K ; Crystal 2	Crystal 2 Crystal 1 Air at 1 atmosphere	From EMF slope	1
POMD	2	Molar enthalpy of transition or fusion, kJ/mol ; Crystal 2	Crystal 2 Crystal 1 Air at 1 atmosphere	From EMF	1
RXND	5 1 2 3	Molar Gibbs energy of reaction, kJ/mol		Calculated from EMF cell potential	13
RXND	5 1 2 3	Molar Gibbs energy of reaction, kJ/mol		Calculated from EMF cell potential	17
RXND	1 4 3	Molar Gibbs energy of reaction, kJ/mol		Calculated from EMF cell potential	1
RXND	1 4 3	Molar enthalpy of reaction, kJ/mol		From EMF	1

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Thermodynamic stability of AuSe at temperature from (400 to 700) K by a solid state galvanic cell

Feng, D.[Dawei], Taskinen, P.[Pekka]

ABSTRACT