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How to make ‘stable’ ACC: protocol and preliminary structural characterization

Published online by Cambridge University Press:  05 July 2018

J. D. Rodriguez-Blanco ,
S. Shaw  and
L. G. Benning
J. D. Rodriguez-Blanco*
Affiliation:
School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK
S. Shaw
Affiliation:
School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK
L. G. Benning
Affiliation:
School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK
*
*E-mail: [email protected]
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Abstract

A reproducible and simple protocol to synthesize and stabilize the metastable CaCO3·nH2O phase termed amorphous calcium carbonate (ACC) was developed in order to allow the characterization of its structure at the nanoscale using high-resolution microscopy combined with Raman spectroscopy and X-ray diffraction. ‘Stable’ ACC consists of relatively smooth spherical particles, 50—200 nm in size, that have XRD and Raman patterns with no intense peaks or sharp bands, as expected from amorphous material. Furthermore, high-resolution imaging also supports this finding but in addition, beam-damage induced crystallization and the concomitant formation of locally ordered domains in the ACC spheres are discussed.

Type
Research Article
Information
Mineralogical Magazine , Volume 72 , Issue 1 , February 2008 , pp. 283 - 286
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2008

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