Abstract:Recherche sur les Solides d OrganisationFrom an 001 Fourier synthesis of Ba-hectorite in the '0 layer' state the z coordinate of barium has been determined. The Ba ion is in a hexagonal hole of the sheet, 4.18 ,~, from the octahedral layer.
“…Dans un travail pr6c6dent (Kadi-Hanifi, 1977) nous avons localis6 l'ion compensateur Ba dans une hectorite fi l'6tat anhydre (6tat dit '0 couche'). Rappelons que l'hectorite est un min4ral argileux fi structure lamellaire de formule [Mgs.3(Li0.7 ~ Ba0.35)]Si8Ozo(OH)zF 2 et que l'ion Ba compense le d6ficit de charge du feuillet.…”
(Recu le 14 ddcembre 1976(Recu le 14 ddcembre , acceptd le 25 fdvrier 1977 NMR and X-ray diffraction are used to show that in ' 1 layer' Ba-hectorite the Ba cation leaves the 'hexagonal' hole in order to associate with the hydration layer.
“…Dans un travail pr6c6dent (Kadi-Hanifi, 1977) nous avons localis6 l'ion compensateur Ba dans une hectorite fi l'6tat anhydre (6tat dit '0 couche'). Rappelons que l'hectorite est un min4ral argileux fi structure lamellaire de formule [Mgs.3(Li0.7 ~ Ba0.35)]Si8Ozo(OH)zF 2 et que l'ion Ba compense le d6ficit de charge du feuillet.…”
(Recu le 14 ddcembre 1976(Recu le 14 ddcembre , acceptd le 25 fdvrier 1977 NMR and X-ray diffraction are used to show that in ' 1 layer' Ba-hectorite the Ba cation leaves the 'hexagonal' hole in order to associate with the hydration layer.
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