Magnesium-Mediated Nanocrystalline Mosaics of Calcite
Magnesium-Mediated Nanocrystalline Mosaics of Calcite
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DOI：
10.1021/cg800331a
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发表时间：
2009-01-01
影响因子：
3.8
通讯作者：
Imai, Hiroaki
中科院分区：
文献类型：
--
作者：
Nishino, Yuichi;Oaki, Yuya;Imai, Hiroaki
镁离子作为一种辅助成分广泛存在于钙基生物矿物中。在本报告中，基于纳米结构研究了镁离子对碳酸钙晶体生长的影响。在大量镁离子存在的情况下，在过饱和溶液中生长的方解石的形态从规则的菱面体急剧转变为由纳米晶镶嵌体组成的球形结构。虽然镁离子最多替代了晶格中约6%的钙离子，但过量的镁会产生无定形相，从而通过调节方解石的晶体生长形成纳米结构。
Magnesium ions are widely found in calcium-based biominerals as an accessory component. In this report, the influence of magnesium ions on the crystal growth of CaCO(3) was investigated on the basis of the nanostructure. The morphology of calcite grown in a supersaturated solution was drastically changed from a regular rhombohedron into a spherical architecture consisting of nanocrystalline mosaics in the presence of a large number of magnesium ions. While magnesium ions were substituted for ca. 6% of calcium ions in the crystal lattice at a maximum, an excess amount of magnesium produced an amorphous phase leading to the nanostructure with modulation of the crystal growth of calcite.