Eu incorporation behavior of a Mg-Al-Cl layered double hydroxide
Curtius, Hilde (Institute of Energy Research. Safety Research and Reactor Technology)
Ufer, Kristian (Institute of Energy Research. Safety Research and Reactor Technology)

Fecha:	2007
Resumen:	From leaching experiments with metallic uranium-aluminum research reactor fuel elements in repository-relevant MgCl-rich salt brines, a Mg-Al layered double hydroxide (LDH) with chloride as the interlayer anion was identified as a crystalline secondary phase component. The incorporation behavior of europium into the structure of the Mg-Al-Cl LDH was investigated. Synthesis via co-precipitation was performed. The Mg-Al-Eu-Cl LDH obtained was treated with a concentrated ammonium carbonate solution. No release of Eu was detected; hence the molar stoichiometry of the LDH remained stable with respect to Mg, Al and Eu. This chemical behavior might be the first indication of the incorporation of Eu. The material was further examined by powder X-ray diffraction. Structural parameters were obtained from comparisons of simulated and experimental diffraction patterns of a CO exchanged Mg-Al-Eu LDH and a Mg-Al LDH. The two materials showed different behaviors according to stacking order and lattice parameters. This is an indirect indication of the incorporation of Eu.
Derechos:	Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió publicada
Materia:	Europium ; Fuel elements ; Incorporation ; LDH ; Secondary phases ; Stacking faults
Publicado en:	Clays and Clay Minerals, Vol. 55, Núm. 4 (2007) , p. 354-360, ISSN 1552-8367

DOI: 10.1346/CCMN.2007.0550403

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