Show simple item record

dc.contributor.authorFarhadi Khouzani, M.
dc.contributor.authorChevrier, D.
dc.contributor.authorGüttlein, P.
dc.contributor.authorHauser, K.
dc.contributor.authorZhang, P.
dc.contributor.authorHedin, N.
dc.contributor.authorGebauer, Denis
dc.identifier.citationFarhadi Khouzani, M. and Chevrier, D. and Güttlein, P. and Hauser, K. and Zhang, P. and Hedin, N. and Gebauer, D. 2015. Disordered amorphous calcium carbonate from direct precipitation. CrystEngComm. 17 (26): pp. 4842-4849.

© The Royal Society of Chemistry.Amorphous calcium carbonate (ACC) is known to play a prominent role in biomineralization. Different studies on the structure of biogenic ACCs have illustrated that they can have distinct short-range orders. However, the origin of so-called proto-structures in synthetic and additive-free ACCs is not well understood. In the current work, ACC has been synthesised in iso-propanolic media by direct precipitation from ionic precursors, and analysed utilising a range of different techniques. The data suggest that this additive-free type of ACC does not resemble clear proto-structural motifs relating to any crystalline polymorph. This can be explained by the undefined pH value in iso-propanolic media, and the virtually instantaneous precipitation. Altogether, this work suggests that aqueous systems and pathways involving pre-nucleation clusters are required for the generation of clear proto-structural features in ACC. Experiments on the ACC-to-crystalline transformation in solution with and without ethanol highlight that polymorph selection is under kinetic control, while the presence of ethanol can control dissolution re-crystallisation pathways.

dc.publisherThe Royal Society of Chemistry
dc.titleDisordered amorphous calcium carbonate from direct precipitation
dc.typeJournal Article
curtin.departmentDepartment of Chemistry
curtin.accessStatusOpen access via publisher

Files in this item


There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record