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Eu incorporation behavior of a Mg-Al-Cl layered double hydroxide

Published online by Cambridge University Press:  01 January 2024

Hilde Curtius  and
Kristian Ufer
Hilde Curtius*
Affiliation:
Institute of Energy Research (IEF), IEF-6: Safety Research and Reactor Technology, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
Kristian Ufer
Affiliation:
Institute of Energy Research (IEF), IEF-6: Safety Research and Reactor Technology, Forschungszentrum Jülich GmbH, D-52425 Jülich, Germany
*
*E-mail address of corresponding author: h.curtius@fz-juelich.de
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Abstract

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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 CO32−${\rm{CO}}_3^{2 - }$-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.

Keywords

EuropiumFuel ElementsIncorporationLDHSecondary PhasesStacking Faults
Type
Research Article
Information
Clays and Clay Minerals , Volume 55 , Issue 4 , August 2007 , pp. 354 - 360
Copyright
Copyright © 2007, The Clay Minerals Society

References

Allmann, R. and Donnay, J.D.H., (1969) About the structure of iowaite American Mineralogist 54 296–298.Google Scholar
Bergmann, J. Friedel, P. and Kleeberg, R., (1998) BGMN — a new fundamental parameters based Rietveld program for laboratory X-ray sources, its use in quantitative analysis and structure investigations Commission of Powder Diffraction, International Union of Crystallography, CPD Newsletter 20 5–8.Google Scholar
Bookin, A.S. and Drits, V.A., (1993) Polytype diversity of the hydrotalcite-like minerals. I. Possible polytypes and their diffraction features Clays and Clay Minerals 41 551–557 10.1346/CCMN.1993.0410504.CrossRefGoogle Scholar
Brücher, H., Curtius, H. and Fachinger, J. (2001) R&D for Back-End options for irradiated research reactor fuel in Germany. Transactions of the 5th Topical Meeting on Research Reactor Fuel Management, April 1–3 2001, Aachen, Germany, ENS RRFM.Google Scholar
Drits, V.A. Bookin, A.S. and Rives, V., (2001) Crystal structure and X-ray identification of layered double hydroxides Layered Double Hydroxides: Present and Future New York Nova Science 39–92.Google Scholar
Drits, V.A. and Tchoubar, C., (1990) X-ray Diffraction by Disordered Lamellar Structures New York Springer Verlag 10.1007/978-3-642-74802-8 371 pp.CrossRefGoogle Scholar
Duff, C.M. Coughlin, J.U. and ter Hun, D.G., (2002) Uranium co-precipitation with iron oxide minerals Geochimica et Cosmochimica Acta 66 3533–3547 10.1016/S0016-7037(02)00953-5.CrossRefGoogle Scholar
Hou, X. Kalinichev, A.G. and Kirkpatrick, R.J., (2002) Interlayer structure and dynamics of Cl−-LiAl2-layered double hydroxide: 35C1 NMR observations and molecular dynamics modelling Chemistry of Materials 14 2078–2085 10.1021/cm010745j.CrossRefGoogle Scholar
Mazeina, L. Curtius, H. Fachinger, J. and Odoj, R., (2003) Characterisation of secondary products of uranium-aluminium material test reactor fuel element corrosion in repository-relevant brine Journal of Nuclear Material 323 1–7 10.1016/S0022-3115(03)00316-7.CrossRefGoogle Scholar
Miyata, S., (1975) The synthesis of hydrotalcite-like compounds and their structures and physico-chemical properties Clays and Clay Minerals 31 369–375 10.1346/CCMN.1975.0230508.CrossRefGoogle Scholar
Mullica, D.F. Milligan, W.O. and Beall, G.W., (1979) Crystal Structures of Pr(OH)3, Eu(OH)3 and Tm(OH)3 Journal of Inorganic and Nuclear Chemistry 41 525–532 10.1016/0022-1902(79)80438-8.CrossRefGoogle Scholar
Plançon, A., (2002) CALCIPOW: a program for calculating the diffraction by disordered lamellar structures Journal of Applied Crystallography 35 377 10.1107/S0021889802001449.CrossRefGoogle Scholar
Radha, A.V. Shivakumara, C. and Kamath, P.V., (2005) DIFFaX simulations of stacking faults in layered double hydroxides (LDHs) Clays and Clay Minerals 53 520–527 10.1346/CCMN.2005.0530508.CrossRefGoogle Scholar
Rietveld, H.M., (1967) Line profiles of neutron powder-diffraction peaks for structure refinement Acta Crystallographica 22 151–152 10.1107/S0365110X67000234.CrossRefGoogle Scholar
Solovyov, L.A., (2004) Full-profile refinement by derivative difference minimization Journal of Appied Crystallography 37 743–749 10.1107/S0021889804015638.CrossRefGoogle Scholar
Stumpf, T. Curtius, H. Walther, C. Dardenne, K. Ufer, K. and Fanghänel, T.h., (2007) Incorporation of Eu(III) into a hydrotalcite: a TRLFS and EXAFS study Environmental Science and Technology 41 3186–3191 10.1021/es0624873.CrossRefGoogle ScholarPubMed
Thomas, G.S. Rajamathi, M. and Kamath, P.V., (2004) DiffaX simulations of polytypism and disorder in hydrotalcite Clays and Clay Minerals 52 693–699 10.1346/CCMN.2004.0520603.CrossRefGoogle Scholar
Weiss, A. and Toth, E. (1996) Untersuchungen zur Synthese, Quellungseigenschaften und Anionenaustausch von kristallchemisch modifizierten Doppelhydroxiden vom Hydrotalkit-Typ. Jahrestagung der DTTG, Freiberg, 267–276.Google Scholar