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Determination of clay mineral aspect ratios from conductometric titrations

Published online by Cambridge University Press:  27 February 2018

C. Weber*
Affiliation:
Clay and Interface Mineralogy, RWTH Aachen University, Bunsenstrasse 8, 52072 Aachen, Germany
M. Heuser
Affiliation:
Clay and Interface Mineralogy, RWTH Aachen University, Bunsenstrasse 8, 52072 Aachen, Germany
G. Mertens
Affiliation:
Qmineral, Romeinsestraat 18, 3001 Heverlee, Belgium
H. Stanjek
Affiliation:
Clay and Interface Mineralogy, RWTH Aachen University, Bunsenstrasse 8, 52072 Aachen, Germany
*

Abstract

It has been established that disagreements between different methods of particle size determination of clay minerals can be ascribed to the non-spherical shape of the clay particles. However, by having aspect ratios available, particle sizes can be harmonized. One frequently used approach to obtain aspect ratios is to compare particle sizes originating from at least two devices operating on the basis of different physical principles. In this contribution aspect ratios of nine kaolinite-dominated and one dickite-dominated sample were determined by conductometric titrations. The aspect ratios obtained were then successfully used to correlate particle size distributions from dynamic laser scattering and acoustic spectroscopy.

Type
The 14th George Brown Lecture
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2014

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References

Bergmann, J. & Kleeberg, R. (1998) Rietveld analysis of disordered layer silicates. Materials Science Forum, 278281. 300-305.Google Scholar
Bruggeman, D.A.G.(1935) Berechnung verschiedener physikalischer Konstanten von heterogenen Substanzen I. Dielektrizitä tskonstanten und Leitfähigkeiten der Mischkšrper aus isotropen Substanzen. Annalen der Physik Leipzig, 24, 636679.Google Scholar
Chassagne, C. & Bedeaux, D. (2008) The dielectric response of a colloidal spheroid. Journal of Colloid and Interface Science, 326, 240253.Google Scholar
Chassagne, C., Mietta, F. & Winterwerp, J.C. (2009) Electrokinetic study of kaolinite suspensions. Journal of Colloid and Interface Science, 336, 352359.Google Scholar
Cremers, A.E. & Laudelout, H. (1965) Surface mobilities of cations in clays. Soil Science Society of America Journal, 30, 570576.Google Scholar
Cremers, A.E., van Loon, J. & Laudelout, H. (1966) Geometry effects for specific electrical conductance in clays and soils. Clays and Clay Minerals, 14, 149163.Google Scholar
Dukhin, A.S. & Goetz, P.J. (editors) (2002) Ultrasound for Characterizing Colloids. Particle Sizing, Zeta Potential, Rheology. Studies in Interface Science (D. Möbius & R. Miller, editors), 15, 382 pp. Elsevier.Google Scholar
Dukhin, A.S., Goetz, P.J., Wines, T.H. & Somasundaran, P. (2000) Acoustic and electroacoustic spectroscopy. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 173, 127158.Google Scholar
Dukhin, S.S. & Derjaguin, B.V. (1974) Equilibrium double layer and electrokinetic phenomena. Pp. 49-272 in: Surface and Colloid Science (E. Matijevic, editor), 7, chapter 2. John Wiley & Sons, New York.Google Scholar
Fricke, H. & Curtis, H.J. (1936) The determination of surface conductance from measurements on suspensions of spherical particles. Journal of Physical Chemistry, 40, 715722.Google Scholar
Haynes, W.M., Lide, D.R. & Bruno, T.J., editors (2012) Handbook of Chemistry and Physics. 93rd edition. CRC Press.Google Scholar
Jennings, B.R. (1993) Size and thickness measurement of polydisperse clay samples. Clay Minerals, 28, 485494.Google Scholar
Jennings, B.R. & Parslow, K. (1988) Particle size measurement: The equivalent spherical diameter. Proceedings of the Royal Society of London A: Physical, Mathematical and Engineering Sciences, 419, 137149.Google Scholar
Landau, L.D. & Lifshitz, E.M. (1960) Electrodynamics of continuous media. In: Course of Theoretical Physics, 8. Pergamon Press.Google Scholar
Lu, C. & Mai, Y.-W. (2005) Influence of aspect ratio on barrier properties of polymer-clay nanocomposites. Physical Review Letters, 95, 14.Google Scholar
Mie, G. (1908) Beiträge zur Optik trüber Medien, speziell kolloidaler Metallö sungen. Annalen der Physik, 25, 377445.Google Scholar
Murray, H.H. (2007) Applied clay mineralogy. Occurrences, processing and application of kaolins, bentonites, palygorskite-sepiolite, and common clays. In: Developments in Clay Science, 2. Elsevier.Google Scholar
O’Brien, R.W. & Rowlands, W.N. (1993) Measuring the surface conductance of kaolinite particles. Journal of Colloid and Interface Science, 159, 471476.Google Scholar
Pabst, W., Kunes, K., Havrda, J. & Gregorová, E. (2000) A note on particle size analyses of kaolins and clays. Journal of the European Ceramic Society, 20, 14291437.Google Scholar
Rasmusson, M., Rowlands, W.N., O’Brien, R.W. & Hunter, R. (1997) The dynamic mobiliy and dielectric response of sodium bentonite. Journal of Colloid and Interface Science, 189, 92100.Google Scholar
Slepetys, R.A. & Cleland, A.J. (1993) Determination of shape of kaolin pigment particles. Clay Minerals, 28, 495508.Google Scholar
Street, N. (1956) The surface conductance of kaolinite. Australian Journal of Chemistry, 9, 333346.Google Scholar