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Conditional solubility versus pO2− of cerium(III) oxide in molten equimolar NaCl+KCl at 727°C |
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| Authors: | Richard Combes Marie-Noëlle Levelut Bernard Trémillon |
| Affiliation: | Laboratoire d''Electrochimie Analytique et Appliquée (LA au CNRS no. 216), Ecole Nationale Supérieure de Chimie de Paris, Université Pierre et Marie Curie, Paris (France) |
| Abstract: | Reactions between cerium trichloride and oxide ions were studied in NaCl+KCl (1/1) at 1000°K, by potentiometry with a calcia-stabilized zirconia membrane electrode. Titration curves clearly demonstrated the existence of soluble cerium oxychloride (CeO+) and precipitated cerium oxide (Ce2O3), with respective dissociation constants 10?11 and 10?30 (molality scale). The corresponding conditional solubility diagram {log S (CeIII)=f(pO2?)} is presented and discussed. |
| Keywords: | To whom correspondence should be addressed: Laboratoire d'Electrochimie Analytique et Appliquée. E.N.S.C.P. 11 rue Pierre et Marie Curie 75231-Paris Cedex 05 France. |
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