Stucki JW, Golden DC, Roth CB (1984) Effects of reduction and reoxidation of structural iron on the surface charge and dissolution of dioctahedral
Comparative FT-IR study of structural modifications during acid treatment of dioctahedral
smectites and hectorite, Spectrochim Acta A 54: 1397-1406.
smectite used in this work is a reference montmorillonite sample (SWy-2) from the Source Clays Repository of The Clay Minerals Society .
Host Materials, A dioctahedral
smectite SWy-2 originated from bentonites of Wyoming (USA) is selected for the present study.
The 060 reflection at 1.50 A confirms that the clay was a dioctahedral
smectite, based on this signal in the interval 1.492 [Angstrom] to 1.504 [Angstrom], typical of montmorillonite [36, 48].
Grauby, "Hydrothermal synthesis of dioctahedral
smectites: the Al-[Fe.sup.3+] chemical series.
The occupation of the structural positions in the octahedral sheet generates trioctahedral sheet silicates where each O or OH is surrounded by 3 divalent cations, like Fe(II) or Mg(II), and dioctahedral
sheet silicates where each O or OH ion is surrounded by 2 trivalent cations, mostly Al(III) .
Delvaux, "Comparative efficacy of dioctahedral
smectite (Smecta[R]) and a probiotic preparation in chronic functional diarrhoea," Digestive and Liver Disease, vol.
and Parry, W.T.: 1986, Dioctahedral
corrensite from Permian red beds, Lisbon Valley, Utah.
Scientific Opinion on the safety and efficacy of bentonite (dioctahedral
montmorillonite) as feed additive for all species.
The band in 3615 [cm.sup.-1] for the Pal-1 spectrum can be attributed to the stretching vibrations of Mg-OH from the dioctahedral
Drits, "The distribution of octahedral cations in the 2:1 layers of dioctahedral
smectites studied by oblique-texture electron diffraction," Clay Minerals, vol.