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首页> 外文期刊>The American mineralogist >Equation of state of carbonated hydroxylapatite at ambient temperature up to 10 GPa: Significance of carbonate
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Equation of state of carbonated hydroxylapatite at ambient temperature up to 10 GPa: Significance of carbonate

机译：在高达10 GPa的环境温度下碳酸羟基磷灰石的状态方程：碳酸盐的意义

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摘要

The incorporation of the carbonate ion into the crystal structure of hydroxylapatite results in the creation of vacancies, oxygen-loss, and disorder, with consequent changes in physical and chemical properties. High-pressure experimental investigation up to 10 GPa of two synthetic carbonated hydroxylapatite samples with up to 11 wt% CO3, using a diamond-anvil cell and synchrotron powder X-ray diffraction, provides the first rigorous assessment of the mechanical behavior of the carbonated hydroxylapatite. The pressure-volume data suggest that the isothermal bulk modulus of these carbonated hydroxylapatites has been significantly decreased by the presence of the carbonate (up to about 15%), which in turn will affect all the carbonated apatite-related reactions in the geosystem. Since hydroxylapatite is one of the major components of the bones and teeth, the incorporation of the carbonate in the hydroxylapatite weakens teeth and bones not only chemically, but also physically.
机译：将碳酸根离子掺入羟基磷灰石的晶体结构中导致空位，氧损失和无序的产生，从而物理和化学性质发生变化。使用金刚石砧盒和同步加速器粉末X射线衍射对两个合成碳酸盐羟基磷灰石样品进行了高达10 GPa的高压实验研究，该样品使用金刚石砧池和同步加速器粉末X射线衍射进行了首次严格的碳酸盐羟基磷灰石力学行为评估。压力-体积数据表明，由于存在碳酸盐（最多约15％），这些碳酸盐化羟基磷灰石的等温体积模量已大大降低，这反过来又会影响地球系统中所有与碳酸盐化磷灰石有关的反应。由于羟磷灰石是骨骼和牙齿的主要成分之一，因此碳酸盐在羟磷灰石中的掺入不仅在化学上而且在物理上都会削弱牙齿和骨骼。

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