Simulation of the XRD patterns, structural properties of a synthetic Na-Hectorite exchanged Cu2+ and Ca2+

M.S. Karmous (1) , Walid Oueslati (1) , H. Ben Rhaiem (1) , J. L. Robert (2) , A. Ben Haj Amara (1)

1 LaboratoiredePhysiquedesMatériauxLamellairesetNanomatériauxHybrides(LPMLNMH), Département de physique
2 IMPMC - Institut de minéralogie et de physique des milieux condensés

The aim of this paper is to determine the hydration characteristics of Na-hectorite exchanged Cu2+ or Ca2+. The number and positions of H2O molecules are determined by an indirect method based on the comparison between theoretical and experimental XRD patterns. The obtained results on air-dried Hectorite-Cu (H-Cu) and Hectorite-Ca (H-Ca) showed that these samples are characterised by 12.49 Å and 15.10 Å basal spacing respectively. These values correspond respectively to one and two water layers in the interlamellar space.

Mots clés: simulation XRD; synthetic hectorite; H-Cu; H-Ca; hydration

Domaines: Sciences de la Terre

M.S. Karmous, Walid Oueslati, H. Ben Rhaiem, J. L. Robert, A. Ben Haj Amara. Simulation of the XRD patterns, structural properties of a synthetic Na-Hectorite exchanged Cu2+ and Ca2+. Z. Kristallogr. Suppl., 2007, 26, pp.503-508. ⟨hal-00543654⟩