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

被引:14
|
作者
Kacim, S [1 ]
Hajjaji, M [1 ]
机构
[1] Fac Sci Semlalia, Dept Chim, Chim Phys Lab, Marrakech, Morocco
关键词
firing transformation; carbonatic clay; Triassic; Morocco; XRD;
D O I
10.1180/0009855033830102
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The firing transformations of a Triassic calcareous clay were investigated, in the range 800-1075degreesC, 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.
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页码:361 / 365
页数:5
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