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From “Loose” to “Dense” Crystalline Phases of Calcium Carbonate through “Repulsive” Interactions: An Experimental Charge‐Density Study
Author(s) -
Nelyubina Yulia V.,
Lyssenko Konstantin A.
Publication year - 2012
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201201457
Subject(s) - aragonite , calcite , calcium carbonate , ion , carbonate , phase (matter) , crystal (programming language) , calcium , charge density , chemical physics , crystallography , chemistry , mineralogy , biomineralization , materials science , inorganic chemistry , chemical engineering , physics , organic chemistry , quantum mechanics , computer science , engineering , programming language
Anion – anion interactions in an eggshell : Experimental electron density analysis for two polymorphs of calcium carbonate revealed why the less stable form, aragonite, has higher density than the most stable form, calcite. Although believed to be exclusively repulsive, the interactions between anions cause them to bind more tightly in a crystal and thus make the aragonite phase denser than its calcite counterpart (see figure).