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Characterization for industrial applications of clays from Lembo deposit, Mount Bana (Cameroon)

Published online by Cambridge University Press:  09 July 2018

P. Pialy ,
C. Nkoumbou ,
F. Villiéras ,
A. Razafitianamaharavo ,
O. Barres ,
M. Pelletier ,
G. Ollivier ,
I. Bihannic ,
D. Njopwouo  and
J. Yvon
...Show all authors
P. Pialy
Affiliation:
Laboratoire de Physico-chimie des Matériaux Minéraux, Département de Chimie Inorganique, Faculté des Sciences, B.P. 812 Yaoundé, Cameroon Equipe de Géologie Economique et Environnementale, Département des Sciences de la Terre, Faculté des Sciences, B.P. 812 Yaoundé, Cameroon
C. Nkoumbou*
Affiliation:
Equipe de Géologie Economique et Environnementale, Département des Sciences de la Terre, Faculté des Sciences, B.P. 812 Yaoundé, Cameroon Laboratoire Environnement et Minéralurgie, Nancy-Université, CNRS, 15 Avenue du Charmois, BP 40 F- 54501 Vandoeuvre-lès-Nancy, France
F. Villiéras
Affiliation:
Laboratoire Environnement et Minéralurgie, Nancy-Université, CNRS, 15 Avenue du Charmois, BP 40 F- 54501 Vandoeuvre-lès-Nancy, France
A. Razafitianamaharavo
Affiliation:
Laboratoire Environnement et Minéralurgie, Nancy-Université, CNRS, 15 Avenue du Charmois, BP 40 F- 54501 Vandoeuvre-lès-Nancy, France
O. Barres
Affiliation:
Laboratoire Environnement et Minéralurgie, Nancy-Université, CNRS, 15 Avenue du Charmois, BP 40 F- 54501 Vandoeuvre-lès-Nancy, France
M. Pelletier
Affiliation:
Laboratoire Environnement et Minéralurgie, Nancy-Université, CNRS, 15 Avenue du Charmois, BP 40 F- 54501 Vandoeuvre-lès-Nancy, France
G. Ollivier
Affiliation:
Laboratoire Environnement et Minéralurgie, Nancy-Université, CNRS, 15 Avenue du Charmois, BP 40 F- 54501 Vandoeuvre-lès-Nancy, France
I. Bihannic
Affiliation:
Laboratoire Environnement et Minéralurgie, Nancy-Université, CNRS, 15 Avenue du Charmois, BP 40 F- 54501 Vandoeuvre-lès-Nancy, France
D. Njopwouo
Affiliation:
Laboratoire de Physico-chimie des Matériaux Minéraux, Département de Chimie Inorganique, Faculté des Sciences, B.P. 812 Yaoundé, Cameroon
J. Yvon
Affiliation:
Laboratoire Environnement et Minéralurgie, Nancy-Université, CNRS, 15 Avenue du Charmois, BP 40 F- 54501 Vandoeuvre-lès-Nancy, France
J-. P. Bonnet
Affiliation:
Groupe d'Etude des Matériaux Hétérogènes, ENSCI, 47 à 73, avenue Albert Thomas, 87065 Limoges Cedex, France
*
*E-mail: charles.nkoumbou@ensg.inpl-nancy.fr
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Abstract

The Lembo clay deposit occurs on orthogneiss, but it also comprises clays with litho-relicts of volcanic rocks. In this study, ten samples from two sites were investigated. The mineralogical compositions consisted of kaolinite + halloysite + illite + quartz + hematite + anatase ± rutile ± orthoclase ± sanidine ± magnetite ± maghemite ± goethite ± Ba-Al-Fe-phosphates ± carbonates ± sulphates. Kaolinite-halloysite and quartz are the prevailing minerals. Some volcanicderived clays contain Fe-rich kaolinite-halloysite (9.6–14.1 wt.% Fe2O3). The chemical compositions, colours and specific surface area (SSA) measurements reveal two groups of clays: one with a positive whiteness index (IB), small SSA and small Fe content, and the other showing a large SSA, negative IB and relatively large Fe contents. The compositions of the first group are close to those of clays from the Mayouom deposit (Cameroon), and from some European commercial kaolins used in ceramics. Relatively Fe-rich clay materials may conform to most formulations of earthen bricks. As a whole, the Lembo clay deposit comprises various compositions of kaolinitic clays, which may yield the opportunity for extensive application in ceramics.

Keywords

clay materialscharacterizationindustrial applicationsCameroon
Type
Research Article
Information
Clay Minerals , Volume 43 , Issue 3 , September 2008 , pp. 415 - 435
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2008

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