Colloidal pathways of amorphous calcium carbonate formation lead to distinct water environments and conductivity.

ABSTRACT: CaCO₃ is the most abundant biomineral and a major constituent of incrustations arising from water hardness. Polycarboxylates play key roles in controlling mineralization. Herein, we present an analytical and spectroscopic study of polycarboxylate-stabilized amorphous CaCO₃ (ACC) and its formation via a dense liquid precursor phase (DLP). Polycarboxylates facilitate pronounced, kinetic bicarbonate entrapment in the DLP. Since bicarbonate is destabilized in the solid state, DLP dehydration towards solid ACC necessitates the formation of locally calcium deficient sites, thereby inhibiting nucleation. Magic-angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy of poly-aspartate-stabilized ACC reveals the presence of two distinct environments. The first contai

SUBMITTER: Gindele MB 

PROVIDER: S-EPMC10761707 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature