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    • Mechanism of unusual polymorph transformations in calcium carbonate: Dissolution-recrystallization vs additive-mediated nucleation

      Arpita Sarkar Samiran Mahapatra

      Volume 124 Issue 6 November 2012 pp 1399-1404

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/124/06/1399-1404

    • Keywords

       

      Polymorph transformation; calcium carbonate; calcite; vaterite; aragonite; dissolution-recrystallization; additive-mediated.

    • Abstract

       

      Unusual transformation of one CaCO3 phase to another has been reported by the process of dissolution-recrystallization and under the influence of additive. In one case, while metastable vaterite transforms to another metastable phase aragonite by simple refluxing in distilled water, it instead transforms thermodynamically stable phase calcite upon refluxing in its `mother-liquor’. This is explained by the process of dissolution-recrystallization. In another case, aragonite is preferentially synthesized over calcite in the presence of molten lauric acid as an additive.

    • Author Affiliations

       

      Arpita Sarkar1 Samiran Mahapatra1

      1. Unilever R&D, 64 Main Road, Whitefield, Bangalore 560 066, India

    • Dates

       
      Published
      November 2012

  • Journal of Chemical Sciences | News

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