Department of Systems Innovation, Graduate School of Engineering, University of Tokyo, 7-3-1 Hongo Bunkyo-ku 113-8656 Tokyo, Japan.
Korea Institute of Geoscience and Mineral Resources (KIGAM), 92 Gwahang-no, Yuseong-gu, Daejeon 305-350, Korea.
Int J Mol Sci. 2009 Nov 11;10(11):4954-4962. doi: 10.3390/ijms10114954.
Wt% of aragonite, a CaCO(3) polymorph, increased with higher hydraulic activity ( degrees C) of limestone in precipitated calcium carbonate (PCC) from the lime-soda process (Ca(OH)(2)-NaOH-Na(2)CO(3)). Only calcite, the most stable polymorph, was crystallized at hydraulic activity under 10 degrees C, whereas aragonite also started to crystallize over 10 degrees C. The crystallization of PCC is more dependent on the hydraulic activity of limestone than CaO content, a factor commonly used to classify limestone ores according to quality. The results could be effectively applied to the determination of polymorphs in synthetic PCC for eco-friendly paper manufacture.
文石（CaCO3 的多晶型物之一）的质量分数随石灰-苏打法（Ca(OH)2-NaOH-Na2CO3）沉淀碳酸钙（PCC）中灰岩水力学活性（摄氏度）的升高而增加。在水力学活性低于 10°C 的情况下，仅方解石（最稳定的多晶型物）结晶，而文石在 10°C 以上也开始结晶。PCC 的结晶更依赖于灰岩的水力学活性，而非 CaO 含量，这是根据质量对灰岩矿石进行分类的常用因素。该结果可有效应用于环保型纸张制造用合成 PCC 中多晶型物的确定。
