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A Disordered Kaolinite from Concepcion de Buenos Aires, Jalisco, Mexico

Published online by Cambridge University Press:  01 January 2024

Liberto de Pablo
Liberto de Pablo*
Affiliation:
Institute de Geologia, Universidad Nacional Autonoma, Mexico Consejo de Recursos Naturales No Renovables, Mexico D.F., Mexico
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Abstract

A random-layer disordered kaolinite from Conception de Buenos Aires, Jalisco, Mexico, gives an X-ray diffraction pattern resembling that of halloysite but has a kaolinite morphology. The mineral was located in a lignite deposit and, apparently was formed by alteration of volcanic rocks from the Cenozoic, with rapid cooling and sedimentation in lacustrine deposits. It is associated with plagioclase, quartz, cristobalite, montmorillonite, goethite and organic material. The analysis of purified material (44.84 per cent SiO2, 40.36 per cent Al2O3, 0.30 per cent Fe2O3, 0.31 per cent CaO, and 13.99 per cent ignition loss) corresponds to the formula (Si3·88 Al0·11 Fe0·01) (Al3·99 Fe0·01)O10 (OH)8. X-ray diffraction indicated a d001 of 7.56 Å, an intense 020, and displaced and nonsymmetrical reflections corresponding to a bi- and tridimensional diffracting system closer to halloysite than to kaolinite. Computed cell edges were a = 5.18 Å, b = 8.97 Å, and c = 7.45 Å. Electron micrographs showed anhedral rounded particles averaging 0.22 µ in size, while infrared absorption indicated some displacement in the absorption bands. The relationships of the mineral to kaolinite, halloysite and disordered kaolinites are discussed in terms of the 7°38′ twist of the tetrahedra, the intensities of the reflections, and the calculated AlIV substitution.

Type
General Session
Information
Clays and Clay Minerals (National Conference on Clays and Clay Minerals) , Volume 13 , February 1964 , pp. 143 - 150
Copyright
Copyright © The Clay Minerals Society 1964

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References

Brindley, G. W. (1961) Kaolin, serpentine and kindred minerals, X-ray Identification and Crystal Structures of Clay Minerals, 2nd ed. (Edited by Brown, G.), 51-131, Mineralogical Society, London.Google Scholar
Brindley, G. W., and Robinson, K. (1946) Structure of kaolinite, Mineral. Mag. 27, 242–53.Google Scholar
Brindley, G. W., de Sousa Santos, P., and de Sousa Santos, H. (1963) Mineralogical studies of kaolinite-halloysite clays, Part I, Identification problems, Am. Mineralogist 48, 897–910.Google Scholar
Cserna, Z. de (1961) Tcctonic map of Mexico. Geological Society of America.Google Scholar
Engelhardt, W. von, and Goldschmidt, H. (1954). A clay mineral from Provins, France, Beitr. Mineral. Petrog. 4, 319–24.Google Scholar
Newnham, R. E. (1961) A refinement of the dickite structure and some remarks on polymorphism in kaolin minerals, Mineral. Mag. 32, 683–703.Google Scholar
Radoslovich, E. W. (1962) The cell dimensions and symmetry of layer lattice silicates, II, Regression relations, Am. Mineralogist 47, 617–36.Google Scholar
Radoslovich, E. W. (1963) The cell dimensions and symmetry of layer lattice silicates, VI, Serpentine and kaolin morphology, Am. Mineralogist 48, 368–78.Google Scholar
Radoslovich, E. W., and Norrish, K. (1962) The cell dimensions and symmetry of layer lattice silicates, I, Some structural considerations, Am. Mineralogist 47, 599–616.Google Scholar
Robertson, R. H. S., Brindley, G. W., and Mackenzie, R. C. (1954) Kaolin clays from Pugu, Tanganyika, Am. Mineralogist 39, 118–39.Google Scholar
Stubičan, V., and Roy, R. (1961a) Isomorphous substitution and infrared spectra of the layer lattice silicates, Am. Mineralogist 46, 32–51.Google Scholar
Stubičan, V., and Roy, R. (1961b) A new approach to assignment of infrared absorption bands in layer-structure-silicates, Z. Krist. 115, 200–14.CrossRefGoogle Scholar