Formation mechanism and morphology in precipitation of vaterite—nano-aggregation or crystal growth?

By J. Andreassen. 2005

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Real-time investigation of reaction rate and mineral phase modifications of lime carbonation (2012, background): “10, we see that the basal faces of some portlandite crystals display rough features attributed to the early precipitation of spherulitic CaCO3 [47] associated to the formation of amorphous CaCO3 that is known to form at the initial stages of carbonation [48–52,64–65].”
Synthesis Methods and Favorable Conditions for Spherical Vaterite Precipitation: A Review (2019, methodology): “The spherulitic growth mechanism was used to explain the formation of vaterite particles with spherical and dumbbell morphology [47,48].”
A route for the direct crystallization of dolomite (2015, methodology): “This spherulitic growth pathway has so far been documented for the crystallization of pure ACC (Andreassen 2005; Bots et al. 2012; Rodriguez-Blanco et al. 2011; Sand et al. 2012), for a 30% Mg-ACC precursor to monohydrocalcite (Rodriguez-Blanco et al. 2014) as well as in this study where the…”