Journal Article

FZJ-2016-07103

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Determination of the Solubility of Rhabdophanes LnPO $_{4}$ ·0.667H $_{2}$ O (Ln = La to Dy)

Gausse, C. ; Szenknect, S. (Corresponding author) ; Qin, D. W. ; Mesbah, A. ; Clavier, N. ; Neumeier, S.FZJ* ; Bosbach, D.FZJ* ; Dacheux, N.

2016
Wiley-VCH Weinheim

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Please use a persistent id in citations: doi:10.1002/ejic.201600517

Abstract: A systematic study of the solubility of the rhabdophanes LnPO4·0.667H2O (Ln = La–Dy) was performed through oversaturation and undersaturation experiments at different temperatures (298–363 K) to demonstrate the reversibility of the equilibria. The structure of the neoformed phase was controlled carefully over the entire temperature range to enable the unambiguous attribution of the solubility products and the derived thermodynamic data to the rhabdophane phases. The log K°s,0(298 K) values for LnPO4·0.667H2O ranged from –25.6 ± 0.8 (Pr) to –24.9 ± 1.7 (Eu), and the minimum values were for Pr to Sm, whereas the ΔfG° values at 298 K varied between (–1984 ± 2) and (–2004 ± 2) kJ mol–1whatever the lanthanide element considered, except for Eu-rhabdophane, which presented the highest Gibbs energy of formation [(–1896 ± 2) kJ mol–1]. From the solubility data obtained at various temperatures, the enthalpies of formation of the rhabdophanes ΔfH° were found to be (–2151 ± 13) to (–2130 ± 12) kJ mol–1, excepted for that of Eu, which reached (–2057 ± 9) kJ mol–1.

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Contributing Institute(s):

1. Nukleare Entsorgung und Reaktorsicherheit (IEK-6)

Research Program(s):

1. 161 - Nuclear Waste Management (POF3-161) (POF3-161)

Appears in the scientific report 2016

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Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; NCBI Molecular Biology Database ; No Authors Fulltext ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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