%0 Journal Article %T Hydration and hydrolysis of samarium (III) in montmorillonite clay: a neutron diffraction study %+ Laboratoire de Géophysique Interne et Tectonophysique (LGIT) %+ Institut Laue-Langevin (ILL) %+ LMPC %A Sobolev, O. V. %A Charlet, L. %A Cuello, G. J. %A Gehin, A. %A Brendle, J. %A Geoffroy, Nicolas %< avec comité de lecture %@ 0953-8984 %J Journal of Physics: Condensed Matter %I IOP Publishing %V 20 %N 10, article n° 104207 %P NIL_42-NIL_46 %8 2008 %D 2008 %R 10.1088/0953-8984/20/10/104207Journal articles %X Neutron diffraction with isotopic substitution was carried out at room temperature on hydrated samples of Sm montmorillonite, prepared at pH = 4 and 8, in order to find out whether Sm is present as aqueous Sm(OH)3o, Sm3+, or intermediate hydrolyzed species, and how it is linked to the clay surface. It was found that the number of hydrogen atoms (5.5 ± 2.0) nearest to Sm3+ at pH = 4 is equal to or even slightly smaller than that of oxygen atoms (7.5 ± 1.0). This means that Sm3+ is bound to the clay surface and it is probably partially hydrolyzed. This result is very close to those obtained earlier for Yb3+ and Nd3+, despite the different methods of sample preparation and the different mineralogy of the samples. %G English %L insu-00335680 %U https://insu.hal.science/insu-00335680 %~ INSU %~ UNIV-SAVOIE %~ UGA %~ CNRS %~ UNIV-GRENOBLE1 %~ INPG %~ IRSTEA %~ IFSTTAR %~ AGREENIUM %~ INRAE %~ USMB-COMUE %~ UNIV-EIFFEL %~ IFSTTAR-UNIVEIFFEL