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X‐ray diffraction studies on the arrangement of water molecules in a smectite. I.Homogeneous two‐water‐layer Na‐beidellite
Author(s) -
Brahim J. B.,
Armagˇan N.,
Besson G.,
Tchoubar C.
Publication year - 1983
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889883010353
Subject(s) - lamellar structure , diffraction , homogeneity (statistics) , stacking , microcrystalline , molecule , homogeneous , materials science , crystallography , x ray crystallography , montmorillonite , silicate , clay minerals , chemical physics , mineralogy , chemistry , optics , thermodynamics , composite material , physics , organic chemistry , statistics , mathematics
A method of indirect analysis of X‐ray diffraction patterns of homogeneous hydrated microcrystalline silicates is introduced. This method is applied to a sodium beidellite of Rupsroth, Bavaria, Germany, hydrated with two water layers to determine all its structural characteristics: namely, the average dimension and size distribution of coherent domains, stacking mode of the layers along the c * direction, levels and number per unit cell of water molecules. A critical analysis on the `concept of homogeneity' of hydrates and a discussion on the conditions of its application to lamellar microcrystalline silicates with a few numbers of layers are made.