TY - JOUR
T1 - Thermodynamic properties of trivalent lanthanide and actinide ions in molten mixtures of LiCl and KCl
AU - Fukasawa, Kazuhito
AU - Uehara, Akihiro
AU - Nagai, Takayuki
AU - Sato, Nobuaki
AU - Fujii, Toshiyuki
AU - Yamana, Hajimu
N1 - Funding Information:
This research was partly supported by Grants-in-Aid for Scientific Research (No. 22360403) from the Ministry of Education, Culture, Sports, Science and Technology, Japan.
PY - 2012/5
Y1 - 2012/5
N2 - The thermodynamic stability of Ln(III) (Ln: La, Ce, Pr, Tb, and Er) and U(III) complexes in LiCl-KCl system at 923 K was studied by electrochemical techniques. The Gibbs free energy change of the Ln 3+/Ln 0 and U 3+/U 0 redox reactions, ΔG3/0′, was investigated under various mole fraction of KCl, χ K = 0-0.65. In general, ΔG3/0′ increased linearly with the decrease of χ K due to the distortion of octahedral symmetry of LnCl63- and UCl63-, but a few exceptions were found for lighter Ln elements, e.g., La and Ce, at smaller χ K of 0-0.2. The discrepancy suggests an increase of the number of Cl - ions around La 3+ and Ce 3+.
AB - The thermodynamic stability of Ln(III) (Ln: La, Ce, Pr, Tb, and Er) and U(III) complexes in LiCl-KCl system at 923 K was studied by electrochemical techniques. The Gibbs free energy change of the Ln 3+/Ln 0 and U 3+/U 0 redox reactions, ΔG3/0′, was investigated under various mole fraction of KCl, χ K = 0-0.65. In general, ΔG3/0′ increased linearly with the decrease of χ K due to the distortion of octahedral symmetry of LnCl63- and UCl63-, but a few exceptions were found for lighter Ln elements, e.g., La and Ce, at smaller χ K of 0-0.2. The discrepancy suggests an increase of the number of Cl - ions around La 3+ and Ce 3+.
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U2 - 10.1016/j.jnucmat.2012.01.009
DO - 10.1016/j.jnucmat.2012.01.009
M3 - Article
AN - SCOPUS:84860543125
SN - 0022-3115
VL - 424
SP - 17
EP - 22
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 1-3
ER -