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首页> 外文期刊>Crystal growth & design >Doping Incompatible Elements into Calcite through Amorphous Calcium Carbonate
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Doping Incompatible Elements into Calcite through Amorphous Calcium Carbonate

机译：通过无定形碳酸钙将不相容元素掺杂到方解石中

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摘要

Doping large amounts of a incompatible element into calcite, a polymorph of CaCO_3, was achieved by pressurizing amorphous calcium carbonate (ACC) containing a dopant. Strontium-doped ACC samples were prepared from supersaturated solutions. ACC was transformed to calcite at 0.8 GPa and 25 °C. The lattice volume of calcite obtained by pressurizing ACC increased monotonically up to 372.5 ?~3 (1.3% increase from a Sr-free sample) with increasing Sr content in ACC up to 0.15 in Sr/(Sr + Ca). For comparison, the lattice volumes of calcite samples precipitated from supersaturated CaCO_3 solution containing Sr were obtained, but the lattice volume of calcite precipitated from supersaturated solutions showed no noteworthy increase. Results of this study indicate that pressure-induced crystallization is an efficient pathway to dope incompatible elements into crystals.
机译：通过对包含掺杂剂的无定形碳酸钙（ACC）加压，将大量不相容元素掺入方解石（CaCO_3的多晶型物）中。从过饱和溶液制备了掺锶的ACC样品。 ACC在0.8 GPa和25°C下转变为方解石。随着ACC中Sr含量的增加，Sr /（Sr + Ca）中的Sr含量增加到0.15，通过对ACC加压获得的方解石的晶格体积单调增加到372.5？〜3（从无Sr样品增加1.3％）。为了进行比较，获得了从含Sr的过饱和CaCO_3溶液中沉淀的方解石样品的晶格体积，但是从过饱和溶液中沉淀的方解石的晶格体积没有显着增加。这项研究的结果表明，压力诱导的结晶是将不相容元素掺杂到晶体中的有效途径。

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