Bednarik (1995a: 93; 1995b: 879) cautions that schist is less than optimum for the microerosion technique, as the phyllosilicate
minerals do not fracture in a way to produce suitable sharp edges.
HSCAS, a phyllosilicate
clay of the smectite class, is shown to tightly bind aflatoxins and prevent aflatoxicosis in animals (Abbes et al.
Moreover, flake-like phyllosilicate
grains reorientate during compaction, therefore the highest thermal conductivity values are expected along bedding.
Interest is growing in quantitatively assessing competitive anion adsorption on phyllosilicate
minerals and oxyhydroxides (Goldberg and Traina, 1987; Davis and Leckie, 1980; Zachara and others, 1988 and 1989).
Slate, a fine-grained rock consisting mainly of phyllosilicate
minerals, chlorite and muscovite, is created when shale, tuffs, mudstones, or siltstones are subjected to heat and/or pressure (Moorhouse 1959: 366; Turner & Verhoogen 1960: 453).
Data on the amount of hydroxyls groups present on the HNT were not found; however, kaolinite, a similar phyllosilicate
1:1, with the same chemical composition, but with a lamellar shape, has been found to have an amount of surface hydroxyls groups 30 times lower than MMT (35) Thus, it is expected that the surface treatment of HNT with compatibilizers will be less efficient than in the MMT.
We are interested in the interaction of organic molecules with phyllosilicate
Montmorillonite is a 2:1 phyllosilicate
type layered smectite clay, which is the most commonly used clay that contains several thousand individual silicate layers having a thickness of 1 nm and lengths in the order of [10.
Nitric acid-extractable K represents exchangeable K plus some K extracted from within phyllosilicate
and tectosilicates mineral structures.
Although the calculation of kaolinite order indexes such as those proposed by Hinckley (1963) and by Hughes and Brown (1979) was not possible for our samples due to the lack of some discrete reflections for the first case and to the gibbsite influence for the second case, it can be hypothesised that as the weathering advances (lower Ki values) the kaolinite structural disorder increases, and then a continuum range of order degrees of this phyllosilicate
can be observed in a set of samples such as those studied here.
MMT belongs to the 2:1 family of phyllosilicate
clay minerals, the crystal structure consisting of nanometer thick layers of aluminum octahedron sheet sandwiched between two silicon tetrahedron sheets.
2 [micro]m) and fine clay phyllosilicate
suites were determined by X-ray diffraction analysis of sedimented clay tiles after treatment with 2 M KCl or 2 M Mg[Cl.