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[[file:AlotaibiFigure6.jpg|thumb|300px|{{figure number|6}}Anion exchange chromatography. ===Anion exchange chromatography (IEC)===

...ns with the c-axis of the crystal perpendicular to the alternating stacked anion and cation planes. Ordering occurs by the additional alternation of cation ...of the crystal structure of dolomite showing the alternation of cation and anion (carbonate) planes, and the alternation of calcium and magnesium planes.]]

...er through dissolution, weathering and erosion of the host rocks. Being an anion, it sticks to mineral surfaces especially iron from biotite.<ref name=Adeyi