Thermodynamic properties of trivalent lanthanide and actinide ions in molten mixtures of LiCl and KCl

被引：41

作者：

Fukasawa, Kazuhito ^{[1
,2
]}

Uehara, Akihiro ^{[1
]}

Nagai, Takayuki ^{[3
]}

Sato, Nobuaki ^{[4
]}

Fujii, Toshiyuki ^{[1
]}

Yamana, Hajimu ^{[1
]}

机构：

[1] Kyoto Univ, Inst Res Reactor, Div Nucl Engn Sci, Kumatori, Osaka 5900494, Japan

[2] Kyoto Univ, Grad Sch Engn, Nishikyo Ku, Kyoto 6158530, Japan

[3] Japan Atom Energy Agcy, Nucl Fuel Cycle Engn Lab, Tokai, Ibaraki 3191194, Japan

[4] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan

来源：

JOURNAL OF NUCLEAR MATERIALS | 2012年 / 424卷 / 1-3期

关键词：

ELECTROCHEMICAL-BEHAVIOR; URANIUM; LACL3; AMERICIUM; COMPLEXES; PLUTONIUM; SALTS; MELTS; AM; PU;

D O I：

10.1016/j.jnucmat.2012.01.009

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 U3+/U-0 redox reactions, Delta G(3/0)(o)', was investigated under various mole fraction of KCl, chi(K) = 0-0.65. In general, Delta G(3/0)(o)' increased linearly with the decrease of chi(K) due to the distortion of octahedral symmetry of LnCl(6)(3-) and UCl63-, but a few exceptions were found for lighter Ln elements, e.g., La and Ce, at smaller chi(K) of 0-0.2. The discrepancy suggests an increase of the number of Cl- ions around La3+ and Ce3+. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：17 / 22

页数：6

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