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Firing transformations of a carbonatic clay from the High–Atlas, Morocco

Published online by Cambridge University Press:  09 July 2018

S. Kacim  and
M. Hajjaji
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Abstract

The firing transformations of a Triassic calcareous clay were investigated, in the range 800 –1075ºC, by using X-ray diffraction and by measuring some ceramic properties (linear shrinkage, density and porosity). It was found that gehlenite and wollastonite are the only neoformed crystalline phases, when anorthite is also expected. The occurrence of these phases is discussed, emphasizing the role of the activity of free silica and calcite concentration. Moreover, new reaction paths for anorthite and wollastonite are envisaged.

Keywords

firing transformationcarbonatic clayTriassicMoroccoXRD
Type
Research Article
Information
Clay Minerals , Volume 38 , Issue 3 , September 2003 , pp. 361 - 365
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2003

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