Alkali activation behaviour of un-calcined montmorillonite and illite clay minerals
نویسندگان
چکیده
منابع مشابه
A Proposed Phase Diagram for Illite, Expanding Chlorite, Corrensite and Illite-montmorillonite Mixed Layered Minerals
-New and published experimental data on hydrothermally treated (2-kbar water pressure, 300-400~ natural clay minerals is used to construct phase diagrams in composition and pressure-temperature space which define the phase relations of mixed layering solid solution in dioctahedral (illitemontmorillonite) and trioctahedral expanding chlorite and corrensite-like minerals. Three major relations ar...
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Chemical activity diagraoas , prepared to illustrate the properties expected if mixed-layer montmorillonite/illite is regarded as a solid solution, are compared to those derived from a treatment of these materials as a mixture of two phases. If the system is a solid solution, the coexisting aqueous solution should range from higher dissolved silica contents in the presence of kaolinite and a mo...
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-Two variables must be considered when calculating exchange free energies (AG~ for 2:1 clays: (1) anionic field strength, as expressed by equivalent anionic radius (ra), and (2) interlayer water content, as expressed by interlayer molality. For smectites that are in a state of high hydration, interlayer molality is determined by the cations undergoing exchange. Thus AG~ for an exchanging cation...
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The respiration of three phenotypes of Histoplasma capsulatum, the causal agent of histoplasmosis in humans, was markedly reduced by low concentrations of montmorillonite but was reduced less by even higher concentrations of kaolinite or attapulgite (palygorskite). The reduction in respiration followed a pattern that suggested saturation-type kinetics: an initial sharp reduction that occurred w...
متن کاملClay Minerals and Catalysis
More than half a century ago, Irish physicist John Desmond Bernal and Swiss geochemist Victor M. Goldschmidt independently proposed that clay minerals may have played an important role in prebiotic synthesis (Bernal 1949; Goldschmidt 1952). I concur that mineral catalysis must have had a central role in prebiotic synthesis because most uncatalyzed reactions start from simple precursors like hyd...
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ژورنال
عنوان ژورنال: Applied Clay Science
سال: 2018
ISSN: 0169-1317
DOI: 10.1016/j.clay.2018.09.011