Отправлено: 29.06.14 10:43. Заголовок: Determination of clay mineral aspect ratios from conductometric titrations

Determination of clay mineral aspect ratios
from conductometric titrations
C. WEBER1 ,*, M. HEUSER1
, G. MERTENS2 AND H. STANJEK1
1Clay and Interface Mineralogy, RWTH Aachen University, Bunsenstrasse 8, 52072 Aachen, Germany, and 2 Qmineral, Romeinsestraat 18, 3001 Heverlee, Belgium
(Received 19 August 2013; revised 13 November 2013; Editor: Eric Ferrage)
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.

Clay Minerals, (2014) 49, 17–26