The Kinetics of Aragonite Formation from Solution via Amorphous Calcium Carbonate

被引：5

作者：

Clark, Simon M. ^{[1
,2
]}

Grigorova, Vili ^{[1
]}

Colas, Bruno ^{[1
,2
]}

Darwish, Tamim A. ^{[3
]}

Wood, Kathleen ^{[2
]}

Neuefeind, Joerg ^{[4
]}

Jacob, Dorrit E. ^{[5
]}

机构：

[1] Macquarie Univ, Fac Sci & Engn, Sch Engn, North Macquarie Pk, Shellharbour, NSW 2109, Australia

[2] Australian Nucl Sci & Technol Org, Australian Ctr Neutron Scattering, Locked Bag 2001, Sydney, NSW 2232, Australia

[3] Australian Nucl Sci & Technol Org, Natl Deuterat Facil, Sydney, NSW 2232, Australia

[4] Oak Ridge Natl Lab, Spallat Neutron Source, Oak Ridge, TN 37831 USA

[5] Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 2600, Australia

来源：

NANOMATERIALS | 2022年 / 12卷 / 23期

关键词：

neutron scattering; X-ray diffraction; Small Angle Neutron Scattering; Laser-Ablation Inductively Coupled Plasma Mass Spectrometry; themo gravimetric analysis; NOMAD; QUOKKA; ACC; aragonite; Mg; Ca; IN-SITU; SMALL-ANGLE; CRYSTALLIZATION; TRANSFORMATION; CACO3; BIOMINERALIZATION; NUCLEATION; POLYAMORPHISM; MECHANISMS; SCATTERING;

D O I：

10.3390/nano12234151

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页数：13

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