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Average water oxygen density around (A) Cl– at position z = 18 Å, (B) I– at position z = 18 Å, (C) Cl– at position z = 19 Å, and (D) I– at position z = 19 Å. Teh x axis represents the lateral distance (x2 + y2)1/2 and the y axis represents the distance from the positive z direction.
