Stable amorphous calcium carbonate is the main component of the calcium storage structures of the crustacean Orchestia cavimana
Stable amorphous calcium carbonate is the main component of the calcium storage structures of the crustacean Orchestia cavimana
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DOI：
10.2307/1543569
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发表时间：
2002-12-01
影响因子：
1.6
通讯作者：
Luquet, G
中科院分区：
文献类型：
--
作者：
Raz, S;Testeniere, O;Luquet, G
无定形碳酸钙(ACC)是已知的六种碳酸钙中最不稳定的一种。然而，它是由各种生物产生和稳定的。在这项研究中，我们研究了陆生甲壳动物鱼腥草的钙储存结构，以更好地了解它们的形成模式和功能。通过X射线衍射仪、红外光谱、拉曼光谱、热分析和元素分析，确定了组成这些储能结构的矿物为无定形碳酸钙和少量无定形磷酸钙(5%)。我们认为，无定形碳酸钙的使用可能有利于这些储存结构，它们在动物蜕皮期间作为离子储存库发挥作用。它的高溶解性有利于碳酸钙离子的暂时储存，这些碳酸钙离子随后被溶解并在其他地方使用。这些无定形矿物的稳定可能是由于有机基质的大分子成分，以及矿物相中存在的镁和磷。
Amorphous calcium carbonate (ACC) is the least stable form of the six known phases of calcium carbonate. It is, however, produced and stabilized by a variety of organisms. In this study we examined calcium storage structures from the terrestrial crustacean Orchestia cavimana, in order to better understand their formation mode and function. By using X-ray diffraction, infrared and Raman spectroscopy, thermal analysis and elemental analysis, we determined that the mineral comprising these storage structures is amorphous calcium carbonate with small amounts of amorphous calcium phosphate (5%). We suggest that the use of amorphous calcium carbonate might be advantageous for these storage structures, which function as reservoirs of ions during the animal molting period. Its high solubility is beneficial for temporary storage of calcium carbonate ions that are subsequently dissolved and used elsewhere. Stabilization of these amorphous minerals is probably due to macromolecular constituents of the organic matrix, and to the magnesium and phosphate present in the mineral phase.