首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Structural characterisation of X-ray amorphous calcium carbonate (ACC)in sternal deposits of the Crustacea Porcellio scaber
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Structural characterisation of X-ray amorphous calcium carbonate (ACC)in sternal deposits of the Crustacea Porcellio scaber

机译:X射线无定形碳酸钙(ACC)在甲壳纲猪尾骨胸骨沉积物中的结构表征

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摘要

Mineral deposits in land-based woodlice(crustacea,Porcellio scaber)were analysed by high-resolution X-ray 'diffraction,X-ray absorption spectroscopy(EXAFS)and infrared microscopy.Calcium carbonate is stored within the first four anterior sternites before changing the cuticle(shell).These deposits consist of fully X-ray amorphous calcium carbonate(primary particle size less than 100 A).The short-range order is comparable to crystalline calcium carbonate phases(first coordination shell),but there is increasing structural disorder beyond about 3 A.This high degree of structural disorder gives a high solubility,i.e.an easy mobilisation within the biological system.The results are compared with EXAFS data from the literature on other biogenic amorphous calcium carbonates.
机译:通过高分辨率X射线衍射,X射线吸收光谱(EXAFS)和红外显微镜对陆生木虱(甲壳纲,Porcellio scaber)中的矿床沉积物进行了分析。碳酸钙被储存在前四个前within石中,然后改变表皮(壳)。这些沉积物由完全X射线无定形碳酸钙(一次粒径小于100 A)组成。短程有序可与结晶碳酸钙相(第一配位壳)相比,但结构无序性增加超过约3A。这种高度的结构紊乱提供了高溶解度,即易于在生物系统内移动。将结果与文献中有关其他生物无定形碳酸钙的EXAFS数据进行了比较。

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