Solid-phase relations in the FeSe-Ga2Se3-Se system and thermodynamic investigation of the FeGa2Se4 compound and (FeSe)1-х(Ga2Se3)х solid solutions
The iron-gallium chalcogenides are promising materials for application in sustainable energy. This work aimed to investigate the solid-phase relations in the Fe-Ga-Se system in the FeSe-Ga2Se3-Se compositions area and the thermodynamic properties of ternary phases. Based on the experimental results...
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| Format: | Article |
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Elsevier
2025-09-01
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| Series: | Chemical Thermodynamics and Thermal Analysis |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2667312625000471 |
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| author | Faik M. Mammadov Dunya M. Babanly Samira Z. Imamaliyeva Ilaha F. Huseynova Mykola V. Moroz Vusala A. Abbasova Ikhtiyar B. Bakhtiyarly Mahammad B. Babanly |
| author_facet | Faik M. Mammadov Dunya M. Babanly Samira Z. Imamaliyeva Ilaha F. Huseynova Mykola V. Moroz Vusala A. Abbasova Ikhtiyar B. Bakhtiyarly Mahammad B. Babanly |
| author_sort | Faik M. Mammadov |
| collection | DOAJ |
| description | The iron-gallium chalcogenides are promising materials for application in sustainable energy. This work aimed to investigate the solid-phase relations in the Fe-Ga-Se system in the FeSe-Ga2Se3-Se compositions area and the thermodynamic properties of ternary phases. Based on the experimental results and using literature data on boundary systems, the diagram of solid-phase equilibria of the above pointed composition range at room temperature was constructed. It was obtained that the solid solutions based on Ga2Se3 and FeGa2Se4 are in stable tie-lines with elemental selenium.For the thermodynamic study, the following reversible concentration cells (-) Fe(s.) | glycerol + KCl+FeCl2 | (Fe in alloy) (+) were assembled and their electromotive forces (EMF) were measured between 300–450 K temperature interval.The relative partial molar Gibbs energy, enthalpy, and entropy of iron in the alloys were calculated using the linear equations of the temperature dependences of the EMF in the various phase areas of the FeSe-Ga2Se3-Se system that were obtained from these EMF observations. The standard thermodynamic functions of formation and standard entropies of the FeGa2Se4 compound and (FeSe)1-х(Ga2Se3)х (x¯ = 0,55; 0,8; 0,9) solid solutions were computed from the given partial molar quantities using thermodynamic data for Ga2Se3 and the solid-phase equilibria diagram. |
| format | Article |
| id | doaj-art-3e5fa42ef1354c0bbf79024055c25da3 |
| institution | Kabale University |
| issn | 2667-3126 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Chemical Thermodynamics and Thermal Analysis |
| spelling | doaj-art-3e5fa42ef1354c0bbf79024055c25da32025-08-20T03:42:14ZengElsevierChemical Thermodynamics and Thermal Analysis2667-31262025-09-011910020710.1016/j.ctta.2025.100207Solid-phase relations in the FeSe-Ga2Se3-Se system and thermodynamic investigation of the FeGa2Se4 compound and (FeSe)1-х(Ga2Se3)х solid solutionsFaik M. Mammadov0Dunya M. Babanly1Samira Z. Imamaliyeva2Ilaha F. Huseynova3Mykola V. Moroz4Vusala A. Abbasova5Ikhtiyar B. Bakhtiyarly6Mahammad B. Babanly7Institute of Catalysis and Inorganic Chemistry AZ-1143, Baku, Azerbaijan; Azerbaijan State Pedagogical University AZ1000, Baku, Azerbaijan; Corresponding authors.Institute of Catalysis and Inorganic Chemistry AZ-1143, Baku, Azerbaijan; French-Azerbaijani University, Azerbaijan State Oil and Industry University AZ1010, Baku, AzerbaijanInstitute of Catalysis and Inorganic Chemistry AZ-1143, Baku, Azerbaijan; Azerbaijan State University of Economics, Research Center ''Advanced Functional Materials'' AZ1001, Baku, AzerbaijanInstitute of Catalysis and Inorganic Chemistry AZ-1143, Baku, AzerbaijanNational University of Water and Environmental Engineering UA-33028 Rivne, UkraineGanja State University AZ-2000, Ganja, AzerbaijanInstitute of Catalysis and Inorganic Chemistry AZ-1143, Baku, AzerbaijanInstitute of Catalysis and Inorganic Chemistry AZ-1143, Baku, Azerbaijan; Azerbaijan State University of Economics, Research Center ''Advanced Functional Materials'' AZ1001, Baku, Azerbaijan; Baku State University AZ-1148, Baku, Azerbaijan; Corresponding authors.The iron-gallium chalcogenides are promising materials for application in sustainable energy. This work aimed to investigate the solid-phase relations in the Fe-Ga-Se system in the FeSe-Ga2Se3-Se compositions area and the thermodynamic properties of ternary phases. Based on the experimental results and using literature data on boundary systems, the diagram of solid-phase equilibria of the above pointed composition range at room temperature was constructed. It was obtained that the solid solutions based on Ga2Se3 and FeGa2Se4 are in stable tie-lines with elemental selenium.For the thermodynamic study, the following reversible concentration cells (-) Fe(s.) | glycerol + KCl+FeCl2 | (Fe in alloy) (+) were assembled and their electromotive forces (EMF) were measured between 300–450 K temperature interval.The relative partial molar Gibbs energy, enthalpy, and entropy of iron in the alloys were calculated using the linear equations of the temperature dependences of the EMF in the various phase areas of the FeSe-Ga2Se3-Se system that were obtained from these EMF observations. The standard thermodynamic functions of formation and standard entropies of the FeGa2Se4 compound and (FeSe)1-х(Ga2Se3)х (x¯ = 0,55; 0,8; 0,9) solid solutions were computed from the given partial molar quantities using thermodynamic data for Ga2Se3 and the solid-phase equilibria diagram.http://www.sciencedirect.com/science/article/pii/S2667312625000471Iron-gallium selenidesMagnetic materialsThermodynamic functionsPhase diagramEMF method |
| spellingShingle | Faik M. Mammadov Dunya M. Babanly Samira Z. Imamaliyeva Ilaha F. Huseynova Mykola V. Moroz Vusala A. Abbasova Ikhtiyar B. Bakhtiyarly Mahammad B. Babanly Solid-phase relations in the FeSe-Ga2Se3-Se system and thermodynamic investigation of the FeGa2Se4 compound and (FeSe)1-х(Ga2Se3)х solid solutions Chemical Thermodynamics and Thermal Analysis Iron-gallium selenides Magnetic materials Thermodynamic functions Phase diagram EMF method |
| title | Solid-phase relations in the FeSe-Ga2Se3-Se system and thermodynamic investigation of the FeGa2Se4 compound and (FeSe)1-х(Ga2Se3)х solid solutions |
| title_full | Solid-phase relations in the FeSe-Ga2Se3-Se system and thermodynamic investigation of the FeGa2Se4 compound and (FeSe)1-х(Ga2Se3)х solid solutions |
| title_fullStr | Solid-phase relations in the FeSe-Ga2Se3-Se system and thermodynamic investigation of the FeGa2Se4 compound and (FeSe)1-х(Ga2Se3)х solid solutions |
| title_full_unstemmed | Solid-phase relations in the FeSe-Ga2Se3-Se system and thermodynamic investigation of the FeGa2Se4 compound and (FeSe)1-х(Ga2Se3)х solid solutions |
| title_short | Solid-phase relations in the FeSe-Ga2Se3-Se system and thermodynamic investigation of the FeGa2Se4 compound and (FeSe)1-х(Ga2Se3)х solid solutions |
| title_sort | solid phase relations in the fese ga2se3 se system and thermodynamic investigation of the fega2se4 compound and fese 1 х ga2se3 х solid solutions |
| topic | Iron-gallium selenides Magnetic materials Thermodynamic functions Phase diagram EMF method |
| url | http://www.sciencedirect.com/science/article/pii/S2667312625000471 |
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