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Synthesis of aragonite precipitated calcium carbonate by homogeneous precipitate reaction of $Ca(OH)_2\;and Na_2CO_3$  

Park, Jin-Koo (Minerals & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources)
Park, Hyun-Seo (Mineral and Energy Resources Eng, Inha Univ.)
Ahn, Ji-Whan (Minerals & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources)
Kim, Hwan (School of Materials Science & Eng., Seoul National Univ.)
Park, Charn-Hoon (Mineral and Energy Resources Eng, Inha Univ.)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.14, no.3, 2004 , pp. 110-114 More about this Journal
Abstract
Formation behavior of aragonite precipitated calcium carbonate was investigated with changed the concentration of $Na_2CO_3$ solution and addition method which added in the $Ca(OH)_2$ slurry at $75^{\circ}C$. In this reaction, we found that $Na^+$ ions were substituted into $Ca^{2+}$ion site then disturb the growth of calcite, and while proceed the crystal growth in a certain direction and promote the formation of aragonite. Also, a decrease of reaction rate by control the concentration of $CO_3^{2-}$ ion, induce the homogeneous precipitate reaction and increase substitution ability of $Na^+$ ions, consequently it was promote the formation and growth of aragonite.
Keywords
Precipitated calcium carbonate; Aragonite; Homogeneous precipitate reaction;
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