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Distribution of water-water H-bond angles, O···O-H, for waters adsorbed on quartz (011) (left) and quartz (100) (right). Each plot corresponds to a different layer, measured from the quartz surfaces. The top and bottom drawings are for water adsorbed on the hydrophilic and hydrophobic sides, respectively. Each plot is normalized to the total number of waters in each slab and its area is proportional to the number of water-water H-bonds per atom.
