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Lateral atomic density contour maps of (a) oxygen atoms in HC═O groups of formamide on the interlayer octahedral surface, (b) hydrogen atoms in HC═O groups, and (c) hydrogen atoms in NH groups of formamide on the interlayer tetrahedral surface. Green contours, the oxygen atom in HC═O groups; magenta contours, the hydrogen atom in HC═O groups; and blue contours, the hydrogen atom in NH groups.
