Fig. 2
From: Effect of pH on the surface charges of permanently/variably charged soils and clay minerals

SCNs of (a) goethite, (b) montmorillonite, (c) illite, and (d) kaolinite as functions of pH.
From: Effect of pH on the surface charges of permanently/variably charged soils and clay minerals
SCNs of (a) goethite, (b) montmorillonite, (c) illite, and (d) kaolinite as functions of pH.