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Monohydrocalcite and Its Relationship to Hydrated Amorphous Calcium Carbonate in Biominerals
Author(s) -
Neumann Markus,
Epple Matthias
Publication year - 2007
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200601033
Subject(s) - chemistry , amorphous calcium carbonate , extended x ray absorption fine structure , calcium carbonate , amorphous solid , carbonate , infrared spectroscopy , calcium , absorption spectroscopy , spectroscopy , biomineralization , inorganic chemistry , absorption (acoustics) , crystallography , chemical engineering , organic chemistry , physics , quantum mechanics , engineering , acoustics
Calcium carbonate monohydrate (monohydrocalcite) is prepared and structurally characterised by X‐ray diffraction, X‐ray absorption spectroscopy (EXAFS), thermal analysis, IR spectroscopy, and scanning electron microscopy. It is compared to hydrated phases of amorphous calcium carbonate (ACC) that have frequently been observed in biomineralisation. The crystal water is more strongly bound than in hydrated ACC phases, and monohydrocalcite can be distinguished from ACC by its IR spectrum. The EXAFS results suggest that monohydrocalcite is a suitable model for some biogenic and synthetic ACC phases, although not for all of them. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)