The Kinetics of Aragonite Formation from Solution via Amorphous Calcium Carbonate

Simon M. Clark; Vili Grigorova; Bruno Colas; Tamim A. Darwish; Kathleen Wood; Joerg Neuefeind; Dorrit E. Jacob

doi:10.3390/nano12234151

The Kinetics of Aragonite Formation from Solution via Amorphous Calcium Carbonate

Simon M. Clark^*, Vili Grigorova, Bruno Colas, Tamim A. Darwish, Kathleen Wood, Joerg Neuefeind, Dorrit E. Jacob

^*Corresponding author for this work

Research School of Earth Sciences

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

4 Citations (Scopus)

Abstract

Magnesium doped Amorphous Calcium Carbonate was synthesised from precursor solutions containing varying amounts of calcium, magnesium, H₂O and D₂O. The Mg/Ca ratio in the resultant Amorphous Calcium Carbonate was found to vary linearly with the Mg/Ca ratio in the precursor solution. All samples crystallised as aragonite. No Mg was found in the final aragonite crystals. Changes in the Mg to Ca ratio were found to only marginally effect nucleation rates but strongly effect crystal growth rates. These results are consistent with a dissolution-reprecipitation model for aragonite formation via an Amorphous Calcium Carbonate intermediate.

Original language	English
Article number	4151
Journal	Nanomaterials
Volume	12
Issue number	23
DOIs	https://doi.org/10.3390/nano12234151
Publication status	Published - Dec 2022

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title = "The Kinetics of Aragonite Formation from Solution via Amorphous Calcium Carbonate",

abstract = "Magnesium doped Amorphous Calcium Carbonate was synthesised from precursor solutions containing varying amounts of calcium, magnesium, H2O and D2O. The Mg/Ca ratio in the resultant Amorphous Calcium Carbonate was found to vary linearly with the Mg/Ca ratio in the precursor solution. All samples crystallised as aragonite. No Mg was found in the final aragonite crystals. Changes in the Mg to Ca ratio were found to only marginally effect nucleation rates but strongly effect crystal growth rates. These results are consistent with a dissolution-reprecipitation model for aragonite formation via an Amorphous Calcium Carbonate intermediate.",

keywords = "ACC, Laser-Ablation Inductively Coupled Plasma Mass Spectrometry, Mg/Ca, NOMAD, QUOKKA, Small Angle Neutron Scattering, X-ray diffraction, aragonite, neutron scattering, themo gravimetric analysis",

author = "Clark, {Simon M.} and Vili Grigorova and Bruno Colas and Darwish, {Tamim A.} and Kathleen Wood and Joerg Neuefeind and Jacob, {Dorrit E.}",

note = "Publisher Copyright: {\textcopyright} 2022 by the authors.",

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month = dec,

doi = "10.3390/nano12234151",

language = "English",

volume = "12",

journal = "Nanomaterials",

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T1 - The Kinetics of Aragonite Formation from Solution via Amorphous Calcium Carbonate

AU - Clark, Simon M.

AU - Grigorova, Vili

AU - Colas, Bruno

AU - Darwish, Tamim A.

AU - Wood, Kathleen

AU - Neuefeind, Joerg

AU - Jacob, Dorrit E.

PY - 2022/12

Y1 - 2022/12

N2 - Magnesium doped Amorphous Calcium Carbonate was synthesised from precursor solutions containing varying amounts of calcium, magnesium, H2O and D2O. The Mg/Ca ratio in the resultant Amorphous Calcium Carbonate was found to vary linearly with the Mg/Ca ratio in the precursor solution. All samples crystallised as aragonite. No Mg was found in the final aragonite crystals. Changes in the Mg to Ca ratio were found to only marginally effect nucleation rates but strongly effect crystal growth rates. These results are consistent with a dissolution-reprecipitation model for aragonite formation via an Amorphous Calcium Carbonate intermediate.

AB - Magnesium doped Amorphous Calcium Carbonate was synthesised from precursor solutions containing varying amounts of calcium, magnesium, H2O and D2O. The Mg/Ca ratio in the resultant Amorphous Calcium Carbonate was found to vary linearly with the Mg/Ca ratio in the precursor solution. All samples crystallised as aragonite. No Mg was found in the final aragonite crystals. Changes in the Mg to Ca ratio were found to only marginally effect nucleation rates but strongly effect crystal growth rates. These results are consistent with a dissolution-reprecipitation model for aragonite formation via an Amorphous Calcium Carbonate intermediate.

KW - ACC

KW - Laser-Ablation Inductively Coupled Plasma Mass Spectrometry

KW - Mg/Ca

KW - NOMAD

KW - QUOKKA

KW - Small Angle Neutron Scattering

KW - X-ray diffraction

KW - aragonite

KW - neutron scattering

KW - themo gravimetric analysis

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U2 - 10.3390/nano12234151

DO - 10.3390/nano12234151

M3 - Article

SN - 2079-4991

VL - 12

JO - Nanomaterials

JF - Nanomaterials

IS - 23

M1 - 4151

ER -

The Kinetics of Aragonite Formation from Solution via Amorphous Calcium Carbonate

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