Abstract
Lithium amalgams are used on lithium isotope separation, the process has been studied in its different parameters, but there is no information on the isotopic separation in the presence of ternary metals diluted in the amalgam. The latest voltammetric technique developed for trace analysis is used for the study, to determine the effects of the presence of cadmium, which has been selected on compatibility criteria with the system, in the intermetallic structures of the amalgam. The differential pulse anodic stripping voltammetry indicates the presence of an intermetallic persistent structure after the potassium and lithium oxidation. This structure has a slow formation and destruction rate, with an anionic character, which accounts for the oxidation potential displacement of the amalgamated metals. The activation energy results of amalgam decomposition reaction in contact with water, allows to establish the intermetallic effects on this reaction, raising the energy of the activated state, on condition that there were time to form it. A reaction mechanism is proposed that agrees with these results. The study of the isotopic composition indicates that the intermetallic species affect the thermodynamic equilibrium between the phases in contact. The measurements of the system`s isotopic composition do not give exact values for the
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Citation Formats
Cordova M, M.
Kinetic and thermodynamic study of lithium ternary amalgams in contact with solvated lithium hydroxide; Estudio cinetico y termodinamico de amalgamas ternarias de litio en contacto con hidroxido de litio solvatado.
Chile: N. p.,
1991.
Web.
Cordova M, M.
Kinetic and thermodynamic study of lithium ternary amalgams in contact with solvated lithium hydroxide; Estudio cinetico y termodinamico de amalgamas ternarias de litio en contacto con hidroxido de litio solvatado.
Chile.
Cordova M, M.
1991.
"Kinetic and thermodynamic study of lithium ternary amalgams in contact with solvated lithium hydroxide; Estudio cinetico y termodinamico de amalgamas ternarias de litio en contacto con hidroxido de litio solvatado."
Chile.
@misc{etde_10153046,
title = {Kinetic and thermodynamic study of lithium ternary amalgams in contact with solvated lithium hydroxide; Estudio cinetico y termodinamico de amalgamas ternarias de litio en contacto con hidroxido de litio solvatado}
author = {Cordova M, M}
abstractNote = {Lithium amalgams are used on lithium isotope separation, the process has been studied in its different parameters, but there is no information on the isotopic separation in the presence of ternary metals diluted in the amalgam. The latest voltammetric technique developed for trace analysis is used for the study, to determine the effects of the presence of cadmium, which has been selected on compatibility criteria with the system, in the intermetallic structures of the amalgam. The differential pulse anodic stripping voltammetry indicates the presence of an intermetallic persistent structure after the potassium and lithium oxidation. This structure has a slow formation and destruction rate, with an anionic character, which accounts for the oxidation potential displacement of the amalgamated metals. The activation energy results of amalgam decomposition reaction in contact with water, allows to establish the intermetallic effects on this reaction, raising the energy of the activated state, on condition that there were time to form it. A reaction mechanism is proposed that agrees with these results. The study of the isotopic composition indicates that the intermetallic species affect the thermodynamic equilibrium between the phases in contact. The measurements of the system`s isotopic composition do not give exact values for the separation factors, but they establish a difference in the sign of enthalpies of the isotopic equilibria. The enthalpy for the isotopic exchange for the binary amalgam is negative, with a value that agrees with those in the literature. Nevertheless, those of the ternary systems are positive, indicating an endothermic character process. (author).}
place = {Chile}
year = {1991}
month = {Dec}
}
title = {Kinetic and thermodynamic study of lithium ternary amalgams in contact with solvated lithium hydroxide; Estudio cinetico y termodinamico de amalgamas ternarias de litio en contacto con hidroxido de litio solvatado}
author = {Cordova M, M}
abstractNote = {Lithium amalgams are used on lithium isotope separation, the process has been studied in its different parameters, but there is no information on the isotopic separation in the presence of ternary metals diluted in the amalgam. The latest voltammetric technique developed for trace analysis is used for the study, to determine the effects of the presence of cadmium, which has been selected on compatibility criteria with the system, in the intermetallic structures of the amalgam. The differential pulse anodic stripping voltammetry indicates the presence of an intermetallic persistent structure after the potassium and lithium oxidation. This structure has a slow formation and destruction rate, with an anionic character, which accounts for the oxidation potential displacement of the amalgamated metals. The activation energy results of amalgam decomposition reaction in contact with water, allows to establish the intermetallic effects on this reaction, raising the energy of the activated state, on condition that there were time to form it. A reaction mechanism is proposed that agrees with these results. The study of the isotopic composition indicates that the intermetallic species affect the thermodynamic equilibrium between the phases in contact. The measurements of the system`s isotopic composition do not give exact values for the separation factors, but they establish a difference in the sign of enthalpies of the isotopic equilibria. The enthalpy for the isotopic exchange for the binary amalgam is negative, with a value that agrees with those in the literature. Nevertheless, those of the ternary systems are positive, indicating an endothermic character process. (author).}
place = {Chile}
year = {1991}
month = {Dec}
}