Figure 3: Quantitative structure model for Cs⁺ distribution in aluminized vermiculite.

(a,b) correspond to the relative proportions of dehydrated (0 W), monohydrated (1 W), bi-hydrated (2 W) or hydroxy-interlayered (HI) layers obtained from XRD analysis after Na⁺ or Cs⁺ saturation of the samples, respectively, as a function of alteration time under acidic conditions (0 h, 383 h and 1055 h from top to bottom in the figure). (c) Relative proportions of mobile and immobile Cs⁺ obtained from extractability measurements (Table 1). (d) Quantitative distribution model of Al(OH)_x^3−x islands, mobile Cs⁺ in hydroxy-interlayered layers and immobile Cs⁺ located in vermiculite layers as a function of the weathering process of vermiculite under acidic conditions.