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Reentrant phase transformation from crystalline ikaite to amorphous calcium carbonate

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Zou,  Zhaoyong
Wouter Habraken (Indep. Res.), Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Bertinetti,  Luca
Luca Bertinetti (Indep. Res.), Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Habraken,  Wouter
Wouter Habraken (Indep. Res.), Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Fratzl,  Peter
Peter Fratzl, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society;

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Citation

Zou, Z., Bertinetti, L., Habraken, W., & Fratzl, P. (2018). Reentrant phase transformation from crystalline ikaite to amorphous calcium carbonate. CrystEngComm, 20(21), 2902-2906. doi:10.1039/C8CE00171E.


Cite as: http://hdl.handle.net/21.11116/0000-0001-89D5-4
Abstract
We report the spontaneous transformation of highly hydrated crystalline ikaite into less hydrated amorphous calcium carbonate (ACC), which has the outer contours of micrometer-sized crystals, a multi-level interconnected porous structure and a very high specific surface area (98.3 cm2 g-1). The ikaite was previously obtained by transformation of an uncommon hydrated ACC with as much H2O as ikaite, synthesized at 2 °C without any additives. The solid-state amorphization was induced by the fast dehydration of the crystal.