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- W2885366723 abstract "ABSTRACT Five clay deposits in Foumban, west Cameroon, were studied for their morphological, mineralogical and geochemical properties to determine their suitability for ceramics. The clays were examined with X-ray diffraction, X-ray fluorescence, thermal gravimetric analysis and Fourier-transform infrared spectroscopy. Field studies showed that a homogeneous clayey layer occurs at the upper part of the laterite cover of the interfluves, while the valleys are occupied by a clayey heterogeneous hydromorphic material. The clays are composed of kaolinite, illite, smectite and chlorite, associated with quartz, K-feldspars, plagioclase, goethite, traces of rutile and hematite. Geochemical analyses of these samples show a relatively large amount of SiO 2 (45–71%), Al 2 O 3 (14–31%) and relatively little Fe 2 O 3 (up to 11%), suggesting weathering of mainly granitic and rhyolitic parent rocks. The majority of these clays may be used in the production of structural ceramics such as bricks (refractory or not) and tiles. The relatively high proportion of the alkalis (K 2 O + Na 2 O; 6–8%) in some samples from Marom and Njindare areas might be responsible for the low firing temperatures. The abundance of smectite limits the application of some Koutaba and Marom clays for structural ceramics, while the high Fe 2 O 3 contents (>8%) in some Bangourain clays indicate that some pre-treatment might be necessary prior to use." @default.
- W2885366723 created "2018-08-22" @default.
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- W2885366723 date "2018-09-01" @default.
- W2885366723 modified "2023-10-16" @default.
- W2885366723 title "Mineralogy and geochemical features of Foumban clay deposits (west Cameroon): genesis and potential applications" @default.
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- W2885366723 doi "https://doi.org/10.1180/clm.2018.31" @default.
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