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Table 2 Chemical compositions of the raw and purified bentonite expressed as weight percent of major element oxides based on X-ray fluorescence analyses

From: Characterization and purification of Algerian natural bentonite for pharmaceutical and cosmetic applications

Sample SiO2 (%) Al2O3 (%) Fe2O3 (%) MgO (%) CaO (%) Na2O(%) K2O(%) TiO2(%) SO3(%) LOI(%)
RBN 51.47 18.50 2.66 6.16 2.86 1.72 1.14 0.25 0.34 17.19
RBN-1 56.40 19 .22 2 3.11 1.56 3.12 1 0.45 0.56 12,58
  1. LOI loss on ignition