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Crystallochemistry of clay minerals and their properties
Abstract Experimental studies on a series of three-layer minerals (pyrophyllite, montmorillonite, hydromica, biotite) have shown the dependence of intercrystalline swelling in these minerals on the degree and localization of isomorphic substitutions in the crystals. With the increase of the magnitude of isomorphic substitutions, the degree of intercrystalline swelling will at first rise and then decline. It has also been shown that the increase of isomorphic substitutions in the tetrahedral layer raises the non-exchangeable $ K^{+} $ ion content in these minerals and lowers their swelling capacity. Measurements of clay particle orientation in electrostatic field at different pH values of the medium indicate that the edges of clay mineral crystals have a positive charge in the acid medium and a negative charge in the alkaline medium, which confirms the views previously expressed by Van Olphen, Schofield and Samson. The data obtained suggest that in the acid medium the basal surfaces and the edges of clay mineral particles have an opposite double electric layer. These observations make it possible to explain a number of structural-mechanical features of clays and thus to get a more comprehensive understanding of the nature of their strength.
Crystallochemistry of clay minerals and their properties
Abstract Experimental studies on a series of three-layer minerals (pyrophyllite, montmorillonite, hydromica, biotite) have shown the dependence of intercrystalline swelling in these minerals on the degree and localization of isomorphic substitutions in the crystals. With the increase of the magnitude of isomorphic substitutions, the degree of intercrystalline swelling will at first rise and then decline. It has also been shown that the increase of isomorphic substitutions in the tetrahedral layer raises the non-exchangeable $ K^{+} $ ion content in these minerals and lowers their swelling capacity. Measurements of clay particle orientation in electrostatic field at different pH values of the medium indicate that the edges of clay mineral crystals have a positive charge in the acid medium and a negative charge in the alkaline medium, which confirms the views previously expressed by Van Olphen, Schofield and Samson. The data obtained suggest that in the acid medium the basal surfaces and the edges of clay mineral particles have an opposite double electric layer. These observations make it possible to explain a number of structural-mechanical features of clays and thus to get a more comprehensive understanding of the nature of their strength.
Crystallochemistry of clay minerals and their properties
Osipov, V. I. (author) / Sergeev, E. M. (author)
1972
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
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