Formation of uranium mixed oxides from thermal decomposition of uranyl propionate complexes |
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Authors: | V Gonzalez R M Rojas J Bermúdez |
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Institution: | (1) Instituto de Química Inorgánica Elhúyar del C. S. I. C. Facultad de Ciencias Químicas, Universidad de Madrid, Ciudad Universitaria, Madrid 3, Spain |
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Abstract: | Four new derivatives of uranium with propionic acid, ammonium and various divalent cations have been synthesized, whose general formula corresponds to NH4MUO2(C2H5COO)3]3nH2O, (M=Mn++, Co++, Ni++ and Zn++). These compounds have been studied by X-ray diffraction, differential thermal and thermogravimetric analysis, so as to identify the different solid phases isolated during heat treatment. The existence of a new double oxide of uranium and cobalt with fluorite type structure has also been shown.
Zusammenfassung Vier neue Derivate des Urans mit Propionsäure, Ammonium und verschiedenen zweiwertigen Kationen wurden synthetisiert. Die allgemeine Formel ist: NH4MUO2(C2H5COO)3]3nH2O, (M=Mn++, Co++, Ni++ und Zn++). Diese Verbindungen wurden durch Röntgendiffraktion, Differentialthermoanalyse und thermogravimetrische Analyse untersucht um die während der Wärmebehandlung isolierten verschiedenen Festphasen zu identifizieren. Die Existenz eines neuen Doppeloxides von Uran und Cobalt mit einer Struktur von Fluorit-Typ wurde ebenfalls nachgewiesen.
Résumé Quatre nouveaux dérivés de l'uranium avec l'acide propionique, l'ammonium et divers cations bivalents ont été synthétisés. Leur formule générale correspond à NH4MUO2(C2H5COO)3]3 nH2O, (M=Mn++, Co++, Ni++ et Zn++). Ces composés ont été examinés par diffraction des rayons X ainsi que par analyses thermique et thermogravimétrique afin d'identifier les différentes phases solides isolées pendant leur traitement thermique. L'existence d'un nouvel oxyde double d'uranium et de cobalt de structure type fluorine est également démontrée.
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![ucy](/content/p02v61ut61n85x41/xxlarge1091.gif) ![rcy](/content/p02v61ut61n85x41/xxlarge1088.gif) ![ocy](/content/p02v61ut61n85x41/xxlarge1086.gif) .
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