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On the mechanism of exfoliation of ‘Vermiculite’

Published online by Cambridge University Press:  09 July 2018

S. Hillier ,
E. M. M. Marwa  and
C. M. Rice
S. Hillier*
Affiliation:
The James Hutton Institute, Craigiebuckler, Aberdeen, AB15 8QH, UK Department of Soil and Environment, Swedish University of Agricultural Sciences (SLU), P.O. Box 7014, SE-750 07 Uppsala, Sweden
E. M. M. Marwa
Affiliation:
Department of Geology and Petroleum Geology, University of Aberdeen, AB24 3UE, UK Sokoine University of Agriculture, Department of Soil Science, P. O. Box 3008, Morogoro, Tanzania
C. M. Rice
Affiliation:
Department of Geology and Petroleum Geology, University of Aberdeen, AB24 3UE, UK
*
*E-mail: [email protected]
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Abstract

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Six samples of ‘Vermiculite’ have been studied to investigate the mechanism of its well known but poorly understood property to exfoliate. The samples were analysed quantitatively by XRD to determine their precise mineralogical composition. Electron microprobe methods, including elemental mapping of native potassium and of caesium (introduced by cation exchange) were used to examine variation in the chemical composition of the particles. Most of the samples examined show heterogeneous mineralogical compositions which occur as distinct zones within the volume of individual particles, presenting a mosaic texture. Exfoliation is related to this mosaic distribution of the different mineral phases within the particles. Lateral phase boundaries between vermiculite and mica layers, or vermiculite and chlorite layers are postulated to prevent or impede the escape of gas from a particle, resulting in exfoliation when the pressure exceeds the interlayer bonding forces that hold the layers together. This mechanism provides a common explanation for the exfoliation of ‘Vermiculite’ by thermal methods or by treatment with H2O2. Paradoxically, one sample which consists of pure vermiculite, in the mineralogical sense of the term, demonstrates that pure vermiculite does not and should not exhibit the property of exfoliation. Our explanation of the mechanism of exfoliation explains the commonly observed particle size dependence of exfoliation and the tendency for obviously poly-phase ‘Vermiculite’ samples to show the largest coefficients of expansion.

Keywords

vermiculitehydrobiotitephlogopiteexfoliationhydrogen peroxide
Type
Research Article
Information
Clay Minerals , Volume 48 , Issue 4 , September 2013 , pp. 563 - 582
Creative Commons
Creative Common License - CCCreative Common License - BY
Copyright © The Mineralogical Society of Great Britain and Ireland 2013 This is an Open Access article, distributed under the terms of the Creative Commons Attribution license. (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2013

References

Bailey, S. W. (1980) Comment: Summary of recommendations of AIPEA Nomenclature Committee. Clays and Clay Minerals, 28, 73–78.Google Scholar
Brindley, G. W. & Brown, G. (1984) Crystal Structures of Clay Minerals and their X-Ray Identification. Mineralogical Society Monograph No. 5, London, 495 pp.Google Scholar
Brindley, G.W., Zalba, P. E. & Bethke, C. M. (1983) Hydrobiotite, a regular 1:1 interstratification of biotite and vermiculite layers. American Mineralogist, 68, 420–425.Google Scholar
Coleman, J. N., Lotya, M., O’Neill, A., Bergin, S.D., King, P.J., Khan, U., Young, K., Gaucher, A., De, S., Smith, R.J., Shvets, I.V., Arora, S.K., Stanton, G., Kim, H.Y., Lee, K., Kim, G.T., Duesberg, G.S., Hallam, T., Boland, J.J., Wang, J.J., Donegan, J.F., Grunlan, J.C., Moriarty, G., Shmeliov, A., Nicholls, R.J., Perkins, J.M., Grieveson, E.M., Theuwissen, K., McComb, D.W., Nellist, P. D. & Nicolosi, V. (2011) Two-dimensional nanosheets produced by liquid exfoliation of layered materials. Science, 331, 568–571.CrossRefGoogle ScholarPubMed
Couderc, P. & Douillet, Ph. (1973) Les vermiculites industrielles: exfoliation, caractéristiques minéralogiques et chimiques. Bulletin de la Société Française de Céramique, 99, 51–59.Google Scholar
De la Calle, C. & Suquet, H. (1988) Vermiculite. Pp. 455–496 in: Hydrous Phyllosilicates (Exclusive of Micas) (Bailey, S.W., editor). Reviews in Mineralogy, 19, Mineralogical Society of America. Washington, D.C. Google Scholar
Douglas, L. A. (1989) Vermiculites. Pp. 635–674 in: Minerals in Soil Environments, 2nd ed. (Dixon, J.B. & Weed, S.B., editors). Soil Science Society of America, Book series no.1.Google Scholar
Drosdoff, M. & Miles, E. F. (1938) Action of hydrogen peroxide on weathered mica. Soil Science, 46, 391–395.CrossRefGoogle Scholar
Foster, M. D. (1960) Interpretation of the composition of vermiculites and hydrobiotites. Clays and Clay Minerals, 10, 70–89.Google Scholar
Frank, D. & Edmond, L. (2001) Feasibility for Identifying Mineralogical and Geochemical Traces for Vermiculite Ore Deposits. United States Environmental Protection Agency. Region 10, EPA 910-R-01-002.Google Scholar
Giese, R. F. (1978) The electrostatic interlayer forces of layerstructure minerals. Clays and Clay Minerals, 26, 5l–57.CrossRefGoogle Scholar
Groves, R. C. (1939) Exfoliation of vermiculite by chemical means. Nature, 144, 154.CrossRefGoogle Scholar
Gruner, J. W. (1934) The structure of vermiculites and their collapse by dehydration. American Mineralogist, 19, 557–575.Google Scholar
Guggenheim, S., Adams, J.M., Bain, D.C., Bergaya, F., Brigatti, M.F., Drits, V.A., Formoso, M.L.L., Galán, E., Kogure, T. & Stanjek, H. (2006) Summary of recommendations of nomenclature committees relevant to clay mineralogy: report of the Association Internationale Pour l’Etule de Argiles (AIPEA) Nomenclature Committee for 2006. Clay Minerals, 41, 863–877.CrossRefGoogle Scholar
Hall, M. G. & Lloyd, G. E. (1981) The SEM examination of geological samples with a semiconductor backscattered electron detector. American Mineralogist, 66, 362–368.Google Scholar
Heller-Kallai, L. (2006) Thermally modified clay minerals. Pp. 289–308 in: Developments in Clay Science, 1 (Bergaya, F., Theng, B.K.G. & Lagaly, G., editors). Handbook of Clay Science. Elsevier, Amsterdam.Google Scholar
Hillier, S. (1999). Use of an air brush to spray dry samples for X-ray powder diffraction. Clay Minerals, 34, 127–135.CrossRefGoogle Scholar
Hillier, S. (2003) Quantitative analysis of clay and other minerals in sandstones by X-ray powder diffraction (XRPD). Pp. 213–251 in: Clay Mineral Cements in Sandstones (Worden, R.H. & Morad, S., editors). International Association of Sedimentologists, Special Publication, 34.Google Scholar
Hillier, S. & Clayton, T. (1992) Cation exchange staining of clay minerals in thin section for electron microscopy. Clay Minerals, 27, 379–384.CrossRefGoogle Scholar
Hindman, J. R. (2006) Vermiculite. Pp. 1015–1026 in: Industrial Minerals and Rocks, Commodities, Markets and Uses, 7th ed. (Kogel, J.E., Trivedi, N.C., Barker, M.J. & Krukowski, S., editors) Society of Mining, Metallurgy and Exploration.Google Scholar
Huo, X. Wu, L., Liao, L., Xia, Z. & Wang, L. (2012) The effect of interlayer cations on the expansion of vermiculite. Powder Technology, 224, 241–246.CrossRefGoogle Scholar
Justo, A., Maqueda, C., Perez-Rodriguez, J. L. & Morillo, E. (1989) Expansibility of some vermiculites. Applied Clay Science, 4, 509–51.CrossRefGoogle Scholar
Mackenzie, R.C., editor (1957) The Differential Thermal Investigation of Clays. Mineralogical Society, London.Google Scholar
Marcos, C. & Rodríguez, I. (2011) Expansibility of vermiculites irradiated with microwaves. Applied Clay Science, 51, 33–37.CrossRefGoogle Scholar
Midgley, H. G. & Midgley, C. M. (1960) The mineralogy of some commercial vermiculites. Clay Minerals, 4, 142–150.CrossRefGoogle Scholar
Muiambo, H.F., Focke, W.W., Atanasova, M., Westhuizen, I.V.D. & Tiedt, L. R. (2010) Thermal properties of sodium-exchanged Palabora vermiculite. Applied Clay Science, 50, 51–57.CrossRefGoogle Scholar
Obut, A. & Girgin, I. (2002) Hydrogen peroxide exfoliation of vermiculite and phlogopite. Minerals Engineering, 15, 683–687.CrossRefGoogle Scholar
Obut, A., Girgin, I. & Yorukoglu, A. (2003) Microwave exfoliation of vermiculite and phlogopite. Clays and Clay Minerals, 51, 452–456.CrossRefGoogle Scholar
Omotoso, O., McCarty, D.K., Hillier, S. & Kleeberg, R. (2006) Some successful approaches to quantitative mineral analysis as revealed by the 3rd Reynolds Cup Contest. Clays and Clay Minerals, 54, 748–760.CrossRefGoogle Scholar
Paterson, E. & Swaffield, R. (1987) Thermal analysis, Pp. 99–132 in: A Handbook of Determinative Methods in Clay Mineralogy (Wilson, M.J., editor). Chapman and Hall, New York.Google Scholar
Ruthruff, R. F. (1941) Vermiculite and hydrobiotite. American Mineralogist, 26, 478–484.Google Scholar
Suvorov, S. A. & Skurikhin, V. V. (2003) Vermiculite – a promising material for high-temperature heat insulators. Refractories and Industrial Ceramics, 44, 186–193.Google Scholar
Üçgül, E. & Girgin, I. (2002) Chemical exfoliation characteristics of Karakoc phlogopite in hydrogen peroxide solution. Turkish Journal of Chemistry, 26, 431–439.Google Scholar
Walker, G. F. (1951) Vermiculites and some related mixed-layer minerals. Pp. 199–223 in: X-ray Identification and Crystal Structures of Clay Minerals (Brindley, G.W., editor). Mineralogical Society, London.Google Scholar
Walker, G. F. (1961) Vermiculites. Pp. 297–324 in: The X-ray Identification and Crystal Structures of Clay Minerals (Brown, G., editor). Mineralogical Society, London.Google Scholar
Weldon, M.K., Marsico, V.E., Chabal, Y.J., Agarwal, A., Eaglesham, D.J., Sapjeta, J., Brown, W.L., Jacobson D.C, Caudano, Y., Christman, S. B. & Chaban, E. E. (1997) On the mechanism of the hydrogen-induced exfoliation of silicon. Journal of Vacuum Science & Technology, 15, 1065–1073.Google Scholar