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Journal of Applied Chemistry
Volume 2015 (2015), Article ID 518737, 10 pages
Research Article

Insoluble Content, Ionic Composition, Density, and X-Ray Diffraction Spectra of 6 Evaporites from Niger Republic

1Department of Chemistry, Faculty of Sciences and Techniques, University of Maradi, 410 Maradi, Niger
2Laboratory of Recovery of Valuable Materials, National Center for Research in Materials Sciences, 8027 Soliman, Nabeul, Tunisia

Received 23 October 2014; Revised 11 March 2015; Accepted 12 March 2015

Academic Editor: Isiaka A. Ogunwande

Copyright © 2015 Hassidou Saidou et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Some physicochemical (insoluble content, ionic composition, density, and X-ray diffraction spectra) characteristics of Nigerien evaporites were investigated in this study. The results obtained showed that trona is the main mineral contained in Agadez, Dirkou, Niamey, and Zinder evaporites while thenardite and halite constitute the major minerals in Bilma and Tabalak evaporites, respectively. In addition, all evaporites samples investigated revealed the presence of quartz and halite. Other interesting minerals (calcite, gypsum, sylvite, aphthitalite, nahcolite, illite, burkeite, kaolinite, griceite, and talc) were also detected. The use of Agadez, Dirkou, Niamey, and Zinder evaporites as catalyst to accelerate cowpea cooking is due to bicarbonates ions present in trona. Bilma and Tabalak evaporites employed in animal feeding are due to the halite contained in a significant quantity.