Cover Feature: Stacking Structure of Vaterite Revealed by Atomic Imaging and Diffraction Analysis (Chem. Eur. J. 52/2024)

After a century of discussion, the atomic arrangements of vaterite, one of the polymorphs of CaCO3, have been fully visualized and described as a layer structure consisting of calcium planes and carbonate (CO32−)-containing sheets. The layers are stacked with +60°, −60°, or 180° rotations from the underlying layer with two constraints: i) carbonate ions cannot occupy equivalent positions in alternate layers, and ii) the stacking sequences with orthogonal components are dominated. More information can be found in the Research Article by T. Okumura and co-workers (DOI: 10.1002/chem.202401557).