Figure 1

(a) Organization of (CO3)2− groups within a single layer. (b) (CO3)2− stacking of the 4-layer polytype. (c) Representation of the vaterite structure with the twinning.

(a) Organization of (CO3)2− groups within a single layer. (b) (CO3)2− stacking of the 4-layer polytype. (c) Representation of the vaterite structure with the twinning.