Figure 1
From: Temperature dependence of amorphous magnesium carbonate structure studied by PDF and XAFS analyses

Crystal structure of nesquehonite (MgCO3·3H2O) projected along the (a) b- and (b) a-axes9. Yellow polyhedra and black triangles represent MgO6 octahedra and CO3 groups, respectively. Red and small white spheres denote oxygen and hydrogen atoms, respectively. The crystal structure images were generated using CrystalMaker® software.