Elsevier

Materials Research Bulletin

Volume 12, Issue 11, November 1977, Pages 1095-1102
Materials Research Bulletin

Aragonite formation through precipitation of calcium carbonate monohydrate

https://doi.org/10.1016/0025-5408(77)90038-1Get rights and content

Abstract

Formation of aragonite from amorphous, gelatinous CaCO3 and CaCO3 · H2O precipitated in the solution containing Mg2+ ion was investigated. Amorphous CaCO3 was converted to aragonite via CaCO3 · H2O formation on drying in air. The stability of CaCO3 · H2O in air depended on how long it has been immersed in the mother solution. Effect of Mg2+ ion on the formation of aragonite was discussed on the basis of surface energy of a small particle.

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