Actinide(III) carbonate complexation |
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| Affiliation: | 1. School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China;2. Theoretical Physics Department, National Research Centre, El-Buhouth Str., 12622 Dokki, Giza, Egypt;3. Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;4. Center of Basic Science (CBS), Misr University for Science and Technology (MUST), 6th October City, Egypt;5. Electron Microscope and Thin Films Department, National Research Centre, El-Buhouth Str., 12622 Dokki, Giza, Egypt;6. Yancheng Polytechnic College, Yancheng 224005, China;1. School of Mechanical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China;2. School of Mathematics and Physics, Lanzhou Jiaotong University, Lanzhou 730070, China |
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| Abstract: | The following equations have been developed to estimate trivalent actinide and lanthanide carbonate stability constants: log B10 = −6.128+35.206R−21.557R2; log B20 = 14.797+7.945R−10.304R2, where B10 = aMCO3+/(aM3+aCO32−, B20 = aM(CO3)2−(aM3+(aCO32−), aX is the activity of ion X, M indicates a metal ion and R is the effective ionic radius of the metal ion in six-fold coordination. These equations describe carbonate stability constants for cerium, europium and ytterbium at zero ionic strength. Constants at zero ionic strength were estimated from experimental determinations made in 0.68 molal NaClO4 by accounting for medium effects. |
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