摘要

The structure, synthesis and characterization of amorphous calcium carbonate and the important precursor of biomineralization are introduced. The amorphous phase is thermodynamically metastable. However, its stability and transformation into the crystallized calcium carbonates can be regulated by additives, e.g. functional polymer, protein I and inorganic ions etc. Since the amorphous calcium carbonate has the relatively high solubility and isotropy, its involvements in biomineralization can uniquely lead to the desired structure of crystallized calcium carbonate, which is another important feature of the biominerals in nature. The studies of amorphous calcium carbonate can improve our understanding of the mechanisms of biomineralization and can also provide another improved strategy for the biomimetic preparation of functional materials.