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Proto‐Calcite and Proto‐Vaterite in Amorphous Calcium Carbonates
Author(s) -
Gebauer Denis,
Gunawidjaja Philips N.,
Ko J. Y. Peter,
Bacsik Zoltán,
Aziz Baroz,
Liu Lijia,
Hu Yongfeng,
Bergström Lennart,
Tai CheukWai,
Sham TsunKong,
Edén Mattias,
Hedin Niklas
Publication year - 2010
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201003220
Subject(s) - vaterite , calcite , amorphous calcium carbonate , amorphous solid , calcium carbonate , chemistry , calcium , crystallography , chemical engineering , mineralogy , aragonite , organic chemistry , engineering
Amorphous order : Amorphous calcium carbonates (ACC) have an intrinsic structure relating to the crystalline polymorphs of calcite and vaterite. The proto‐crystalline structures of calcite and vaterite (pc‐ACC and pv‐ACC) are analyzed by NMR (see picture), IR, and EXAFS spectroscopy, which shows that the structuring of ACC relates to the underlying pH‐dependent equilibria.