Infra-red characterization of local clay-sized fractions

M. Echajia, S. Kacim, M. Hajjaji*

Laboratoire de Chimie Physique, Faculté des Sciences Semlalia,

Université Cadi Ayyad, Bd. Prince My Abdellah, B.P. 2390, Marrakech, Maroc

* Corresponding author. Email: hajjaji@ucam.ac.ma

Received: 07 July 2004; revised version accepted: 14 May 2005

Abstract

A fine characterization of FO and FS clay-sized fractions, which were isolated from raw clays taken from Ouarzazate and Safi (Morocco) respectively, was performed by infra-red spectroscopy. The obtained results showed that the both clayey samples contained a poorly ordered kaolinite and micaceous species, which are identified as illite. Moreover, FO consists of a mixture of fibrous minerals (sepiolite and palygorskite), and FS is formed of non swelling chlorite. Also, it is observed that minor amounts of non-clay minerals (quartz and feldspars) are linked to the clay fractions and the networks of clay minerals are the subject of substitutions.

Keywords: Infra-red spectroscopy; Clays; Clay minerals.

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