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From 'loose' to 'dense' crystalline phases of calcium carbonate through 'repulsive' interactions: An experimental charge-density study

机译:通过“排斥”相互作用从碳酸钙的“松散”到“致密”结晶相:一项实验性电荷密度研究

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摘要

Anion-anion interactions in an eggshell: Experimental electron density analysis for two polymorphs of calcium carbonate revealed why the less stable form, aragonite, has higher density than the most stable form, calcite. Although believed to be exclusively repulsive, the interactions between anions cause them to bind more tightly in a crystal and thus make the aragonite phase denser than its calcite counterpart (see figure).
机译:蛋壳中的阴离子-阴离子相互作用:对两种碳酸钙多晶型物进行的实验电子密度分析揭示了为什么稳定性较差的文石(方石)比密度较稳定的方解石要高。尽管被认为是排斥性的,但阴离子之间的相互作用使它们更紧密地结合在晶体中,从而使文石相比方解石对应物更致密(见图)。

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