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

    • Fulltext

       

        Click here to view fulltext PDF


      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

       
  • Journal of Chemical Sciences | News

© 2022-2023 Indian Academy of Sciences, Bengaluru.