ABSTRACT

Thermodynamic properties of bismuth chalcoiodides were determined experimentally by means of the electromotive force method (EMF) measurements of the (-) Bi (solid)/ionic liquid, Bi3+/(Bi in alloy) (solid) (+) concentration cells in the temperature range 300 390 K (sulfide system) and 300 450 K (selenide and telluride systems). Ionic liquid morpholinium formate with addition 0.5 mol% anhydrous BiCl3 was used as an electrolyte. The equilibrium alloys from the different three-phase regions of the corresponding systems were exploited as an anode. The EMF measurements made it possible to calculate the partial molar functions of bismuth in alloys from some three-phase regions. Potential forming reactions were determined based on the solid-phase equilibrium diagrams of the Bi-X-I systems. The standard thermodynamic functions of formation and standard entropies of the BiSI, Bi19S27I3, BiSeI, BiTeI, Bi2TeI, and Bi4TeI1.25 ternary compounds were calculated. The standard thermodynamic functions of BiI3,as well as standard entropies of chalcogens, were used to the calculations. A good correspondence between experimental results and the literary data are shown.

Compounds

#	Formula	Name
1	BiI3	bismuth triiodide
2	Bi2S3	bismuth(III) sulfide
3	Bi2Se3	bismuth(III) selenide
4	Bi2Te3	bismuth(III) telluride

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	Variable	Phase	Method	#Points
POMD	1	Normal melting temperature, K ; Crystal		Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	1	Mass density, kg/m3 ; Crystal	Temperature, K; Crystal Pressure, kPa; Crystal	Crystal	X-ray diffraction	1
POMD	2	Normal melting temperature, K ; Crystal		Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	2	Mass density, kg/m3 ; Crystal	Temperature, K; Crystal Pressure, kPa; Crystal	Crystal	X-ray diffraction	1
POMD	3	Normal melting temperature, K ; Crystal		Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	3	Mass density, kg/m3 ; Crystal	Temperature, K; Crystal Pressure, kPa; Crystal	Crystal	X-ray diffraction	1
POMD	4	Normal melting temperature, K ; Crystal		Crystal Liquid Air at 1 atmosphere	DTA	1
POMD	4	Mass density, kg/m3 ; Crystal	Temperature, K; Crystal Pressure, kPa; Crystal	Crystal	X-ray diffraction	1

Thermodynamics Research Center / ThermoML | Thermochimica Acta

Determination of the thermodynamic functions of bismuth chalcoiodides by EMF method with morpholinium formate as electrolyte

Imamaliyeva, S. Z.[Samira Zakir], Musayeva, S. S.[Sabina Sahib], Babanly, D. M.[Dunya Mahammad], Jafarov, Y. I.[Yasin Isa], Taghiyev, D. B.[Dilgam Babir], Babanly, M. B.[Mahammad Baba]

ABSTRACT