K/Ca and NH₄/Ca selectivity of hydroxyaluminum-interlayered vermiculite and montmorillonite: Contribution from regular and frayed edge exchange sites

Binary exchange of calcium, magnesium, potassium and sodium in calcareous soils in Kurdistan region of Iraq

“…-1 The findings of X-ray diffraction on clay samples indicated that Smectite, Chlorite, Kaolinite, and Illite are the order of clay minerals as shown in table 3. [12] , [24] and [25] reported comparable patterns in the Potassium -Magnesium and Potassium -Sodium exchanges. L-shaped isotherm curves are the most prevalent, figure 2, depicts three pairs of Potassium transfer isotherm curves, each representing a different amount of affinity between the two molecules being examined [26].…”