Structural characteristics of bioinspired amorphous calcium carbonate: Total scattering using polarized neutrons
Calcium carbonate (CaCO3) is a widely studied inorganic compound very abundant in nature as a mineral and a biomineral. In the last two decades, many studies have reported the formation of CaCO3 biominerals through an amorphous precursor -Amorphous Calcium Carbonate (ACC)-, which contains structural water. This structural water has been proposed to control the stability of the amorphous structure. However, a clear picture of the structural characteristics of water in ACC is still lacking. This is mainly due to the difficulties associated with the deuteration of ACC. In this study we propose to use polarized neutron scattering to measure the spin incoherent part of the scattering, and thus be able to obtain total neutron scattering data of ACC without the need of deuterating the sample. Different types of water in ACC will be studied by pre-treating the samples at different temperatures following a TGA curve previously measured. This data will be highly valuable to be able to describe the structural characteristics of water in ACC.
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FERNANDEZ MARTINEZ Alejandro; CUELLO Gabriel; KOISHI Ayumi; STUNAULT Anne and VAN DRIESSCHE Alexander. (2016). Structural characteristics of bioinspired amorphous calcium carbonate: Total scattering using polarized neutrons. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.6-05-980
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