Figure 5.

SEM image of CaCO₃ crystal assembly in presence of AS8: (a) polycrystalline spherical assembly at pH 7.75; (b–b₂) rhombohedral crystal of calcite in two different orientations: (b) (012) and (b₁) (104); (b₂) needle shaped peptide crystals at pH 8.2; (c, c₁) calcite crystal with distorted face and corners observed at pH 9.0. The SEM images were taken at 10 keV (c, c₁: 5 keV), spot size 3 (1.7 nm; c, c₁: 2.1 nm). Magnifications: (a) 2000×; (a₁) 10000×; (a₂) 100000×; (b) 4000×; (b₁) 5000×; (b₂) 500×; (c) 5000×.