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. 2013 Jan 15;3:1074. doi: 10.1038/srep01074

Figure 4. A snapshot of the first water layer on BaF2(111).

Figure 4

F− and Ba2+ ions are color-coded by purple and green, respectively. Red and white sticks represent oxygen and hydrogen atoms of water molecules. Intermolecular hydrogen bonding and water-BaF2(111) bonding are indicated by dashed lines. H-bond definition: O-O distance < 3 Å, O-O-H angle <30 deg.