phyllosilicate


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Related to phyllosilicate: Tectosilicate, nesosilicate

phyllosilicate

[¦fil·ō′sil·ə·kət]
(mineralogy)
A structural type of silicate mineral in which flat sheets are formed by the sharing of three of the four oxygen atoms in each tetrahedron with neighboring tetrahedrons. Also known as layer silicate; sheet mineral; sheet silicate.
References in periodicals archive ?
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 clay minerals.
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.