Abstract
The content of Sr in nacre is stable and second only to Mg, but its ability to induce aragonite is rarely reported. Therefore, the paper studied the effects of Sr2+ concentration, reaction rate and temperature on the biological mineralization of calcium carbonate in presence of egg-white proteins. The results show that Sr2+ could induce the formation of aragonite when coexisting with egg-white proteins as Mg2+. However, the large ion radius of Sr2+ makes it difficult to enter the calcite lattice, so its induction efficiency is much lower than Mg2+. Reducing the mineralization rate and increasing the mineralization temperature are beneficial to the formation of aragonite.
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