Hydration and hydrolysys of Sm3+ and Eu3+ in a clay interlayer: a neutron diffraction study with isotopic substitution - Archive ouverte HAL Access content directly
Journal Articles Radiochimica Acta Year : 2008

Hydration and hydrolysys of Sm3+ and Eu3+ in a clay interlayer: a neutron diffraction study with isotopic substitution

(1) , (1) , (2) , (1) , (3)
1
2
3

Abstract

The coordination of Sm and Eu in the montmorillonite interlayer was studied by neutron diffraction with isotopic substitution. It was found that the number of hydrogen atoms nearest to Sm and Eu were less (NH=5.5±2.0) than oxygen nearest atoms (NO=7.5±1.0). This means that the Sm and Eu are not surrounded only by hydration water molecules, but they are in contact with the oxygen siloxane atoms of the clay basal plane surface. It was found that the number of oxygen atoms of the clay surface giving a contribution to the total coordination number NO should be NOclay≤3. Therefore, the deficit of hydrogen atoms in the first coordination shell of Sm and Eu should be explained supposing that the lanthanide cations are partially hydrolyzed.
Not file

Dates and versions

insu-00372149 , version 1 (31-03-2009)

Identifiers

Cite

Oleg Sobolev, Laurent Charlet, G. J. Cuello, A. Gehin, J. Brendle. Hydration and hydrolysys of Sm3+ and Eu3+ in a clay interlayer: a neutron diffraction study with isotopic substitution. Radiochimica Acta, 2008, 96 (9-11), pp.679 à 683. ⟨10.1524/ract.2008.1553⟩. ⟨insu-00372149⟩
146 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More