Pressure-induced polyamorphism and formation of 'aragonitic' amorphous calcium carbonate

Alejandro Fernandez-Martinez; Bora Kalkan; Simon M. Clark; Glenn A. Waychunas

doi:10.1002/anie.201302974

Pressure-induced polyamorphism and formation of 'aragonitic' amorphous calcium carbonate

Alejandro Fernandez-Martinez^*, Bora Kalkan, Simon M. Clark, Glenn A. Waychunas

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

55 Citations (Scopus)

Abstract

Pressed for time: Amorphous calcium carbonate (ACC) undergoes a reversible amorphous-amorphous phase transition at 10 GPa, adopting an aragonite-like local order. This result suggests a mechanism by which Mg²⁺ - a cation with smaller ionic radius than Ca²⁺ - modifies the local order of ACC to an aragonite-like order by helping to decrease the molar volume of the amorphous phase.

Original language	English
Pages (from-to)	8354-8357
Number of pages	4
Journal	Angewandte Chemie - International Edition
Volume	52
Issue number	32
DOIs	https://doi.org/10.1002/anie.201302974
Publication status	Published - 5 Aug 2013

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abstract = "Pressed for time: Amorphous calcium carbonate (ACC) undergoes a reversible amorphous-amorphous phase transition at 10 GPa, adopting an aragonite-like local order. This result suggests a mechanism by which Mg2+ - a cation with smaller ionic radius than Ca2+ - modifies the local order of ACC to an aragonite-like order by helping to decrease the molar volume of the amorphous phase.",

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Pressure-induced polyamorphism and formation of 'aragonitic' amorphous calcium carbonate

Abstract

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