Recently, the glass-to-crystal transition in oxides was successfully observed via WTMetaD, using two X-ray diffraction (XRD) peak intensities as CVs. By applying the same approach, we aim to capture the diverse alignment of CO 3 2during the phase transition from ACC to vaterite crystals. The vaterite structures, including transition states, will be comprehensively analyzed via WTMetaD simulations starting from the ACC structure. These structures will be used to further investigate phase stability and symmetry through DFT calculations.