We report the interesting finding that crystallization of calcium carbonate (CaCO 3 ) in the presence of dimyristoylphosphatidylglycerol (DMPG) vesicles by a simple gas diffusion method results in the formation of unusual microscopic CaCO 3 spherules. The experimental results indicate that the as-prepared CaCO 3 spherules, which have a complex macroporous structure, are predominantly vaterite. It is believed that DMPG vesicles play an important role in the process of crystallization, and the possible formation mechanism is proposed.
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Liu et al. (2008) studied this question.
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