Nanoporous Structure and Medium-Range Order in Synthetic Amorphous Calcium Carbonate

• DOI: 10.1021/cm100294d
• Publication Date: 2010-04-21T17:01:29Z
• Authors: Andrew L. Goodwin; F. Marc Michel; Brian L. Phillips; David A. Keen; Martin T. Dove; Richard J. Reeder
• Keywords: Amorphous calcium carbonate; Vaterite; Nanoporous; Nanometre

We adopt a reverse Monte Carlo refinement approach, using experimental X-ray total scattering data, to develop structure model for synthetic, hydrated amorphous calcium carbonate (ACC). The ACC is revealed consist of porous calcium-rich framework that supports interconnected channels containing water and molecules. existence previously unrecognized nanometer-scale channel network suggests mechanisms how additives can be accommodated within the provide temporary stabilization, as well influence crystallization process. Moreover, while lacking long-range order, in contains similar Ca packing density present calcite, aragonite, vaterite, yielding clues material converts into different crystalline forms. Our results new starting point advancing our understanding biomineralization development biomimetic approaches next-generation materials synthesis.