Figure 5
From: Empirically testing vaterite structural models using neutron diffraction and thermal analysis
Upper: Polyhedral representation of the vaterite crystal structure (space group P6522) projected along (110) refined from neutron powder diffraction data.
Blue-shaded polyhedral are calcium oxide octahedra, and the brown shaded triangles are carbonate groups. Of the three unique calcium oxide octahedra Ca1 and Ca2 share an edge. All other polyhedral linkages are by corner-sharing. The unit cell is outlined. Lower: (001) projection, blue balls = Ca atoms, grey balls = C atoms, red balls = oxygen atoms.
