Clays and Clay Minerals, Vol. 55, No. 4, 354–360, 2007.
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Authors
Curtius, Hilde
Ufer, Kristian
Issue Date
2007
Type
Article
Language
Keywords
Periodicals , Geology , Europium , Fuel Elements , Incorporation , LDH , Secondary Phases , Stacking Faults
Alternative Title
Eu Incorporation Behavior Of A Mg-al-cl Layered Double Hydroxide
Abstract
From leaching experiments with metallic uranium-aluminum research reactor fuel elements in repository-relevant MgCl2-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 CO2/3--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.
Description
Clays and Clay Minerals, Vol. 55, No. 4, 354–360, 2007. Eu Incorporation Behavior Of A Mg-al-cl Layered Double Hydroxide. Hilde Curtius; Kristian Ufer. DOI: 10.1346/CCMN.2007.0550403. Copyright © 2007, The Clay Minerals Society.
Citation
Clays and Clay Minerals, Vol. 55, No. 4, 354–360, 2007.
Publisher
The Clay Minerals Society
License
Copyright © 2006-2018, The Clay Minerals Society