electronic reprint Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials ISSN 2052-5206 Calcium carbonate microparticle growth controlled by a conjugate drug–copolymer and crystallization time Florica Doroftei, Mariana Dana Damaceanu, Bogdan C. Simionescu and Marcela Mihai Acta Cryst. (2014). B70, 227–235 Copyright c  International Union of Crystallography Author(s) of this paper may load this reprint on their own web site or institutional repository provided that this cover page is retained. Republication of this article or its storage in electronic databases other than as speciﬁed above is not permitted without prior permission in writing from the IUCr. For further information see http://journals.iucr.org/services/authorrights.html Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials publishes scientiﬁc articles related to the structural science of compounds and materials in the widest sense. Knowledge of the arrangements of atoms, including their temporal variations and dependencies on temperature and pressure, is often the key to understand- ing physical and chemical phenomena and is crucial for the design of new materials and supramolecular devices. Acta Crystallographica B is the forum for the publication of such contributions. Scientiﬁc developments based on experimental studies as well as those based on theoretical approaches, including crystal-structure prediction, structure– property relations and the use of databases of crystal structures, are published. Crystallography Journals Online is available from journals.iucr.org Acta Cryst. (2014). B70, 227–235 Florica Doroftei et al. · Calcium carbonate microparticle growth