Stabilization of Aragonite: Role of Mg2+ and Other Impurity Ions
Copyright © 2020 American Chemical Society. Aragonite formation and stabilization in seawater is still an area of active investigation since the thermodynamically stable product at room temperature is calcite. In this manuscript, purely inorganic systems that were found to stabilize aragonite were a...
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| Format: | Journal Article |
| Language: | English |
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AMER CHEMICAL SOC
2020
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| Online Access: | http://purl.org/au-research/grants/arc/LE0775551 http://hdl.handle.net/20.500.11937/80957 |
| _version_ | 1848764299041832960 |
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| author | Boon, Matthew Rickard, William Rohl, Andrew Jones, Franca |
| author_facet | Boon, Matthew Rickard, William Rohl, Andrew Jones, Franca |
| author_sort | Boon, Matthew |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Copyright © 2020 American Chemical Society. Aragonite formation and stabilization in seawater is still an area of active investigation since the thermodynamically stable product at room temperature is calcite. In this manuscript, purely inorganic systems that were found to stabilize aragonite were analyzed by various techniques. Dynamic light scattering was used to characterize the nucleation behavior of the system, and it was found that the presence of magnesium ions during crystal formation inhibits nucleation overall, not just calcite nucleation. In addition, it was found that sulfate is not necessary to stabilize aragonite. Microanalysis by energy dispersive X-ray spectroscopy and electron backscatter diffraction revealed that the aragonite that was formed had a disordered core with sodium, magnesium, and sulfate ions incorporated into the structure. To the best of the authors' knowledge this is the first time an amorphous calcium carbonate (ACC) core in aragonite has been visualized in a completely abiotic, synthetic system (i.e., in the absence of organic molecules). Inclusion of these impurities into the structure may explain the stability of aragonite in natural seawaters. |
| first_indexed | 2025-11-14T11:17:09Z |
| format | Journal Article |
| id | curtin-20.500.11937-80957 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:17:09Z |
| publishDate | 2020 |
| publisher | AMER CHEMICAL SOC |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-809572021-05-14T01:13:29Z Stabilization of Aragonite: Role of Mg2+ and Other Impurity Ions Boon, Matthew Rickard, William Rohl, Andrew Jones, Franca Science & Technology Physical Sciences Technology Chemistry, Multidisciplinary Crystallography Materials Science, Multidisciplinary Chemistry Materials Science AMORPHOUS CALCIUM-CARBONATE PRECIPITATION KINETICS ARTIFICIAL SEAWATER SULFATE MAGNESIUM CRYSTALLIZATION TEMPERATURE NUCLEATION CACO3 MONOHYDROCALCITE Copyright © 2020 American Chemical Society. Aragonite formation and stabilization in seawater is still an area of active investigation since the thermodynamically stable product at room temperature is calcite. In this manuscript, purely inorganic systems that were found to stabilize aragonite were analyzed by various techniques. Dynamic light scattering was used to characterize the nucleation behavior of the system, and it was found that the presence of magnesium ions during crystal formation inhibits nucleation overall, not just calcite nucleation. In addition, it was found that sulfate is not necessary to stabilize aragonite. Microanalysis by energy dispersive X-ray spectroscopy and electron backscatter diffraction revealed that the aragonite that was formed had a disordered core with sodium, magnesium, and sulfate ions incorporated into the structure. To the best of the authors' knowledge this is the first time an amorphous calcium carbonate (ACC) core in aragonite has been visualized in a completely abiotic, synthetic system (i.e., in the absence of organic molecules). Inclusion of these impurities into the structure may explain the stability of aragonite in natural seawaters. 2020 Journal Article http://hdl.handle.net/20.500.11937/80957 10.1021/acs.cgd.0c00152 English http://purl.org/au-research/grants/arc/LE0775551 http://purl.org/au-research/grants/arc/LE130100053 http://purl.org/au-research/grants/arc/LE140100150 AMER CHEMICAL SOC fulltext |
| spellingShingle | Science & Technology Physical Sciences Technology Chemistry, Multidisciplinary Crystallography Materials Science, Multidisciplinary Chemistry Materials Science AMORPHOUS CALCIUM-CARBONATE PRECIPITATION KINETICS ARTIFICIAL SEAWATER SULFATE MAGNESIUM CRYSTALLIZATION TEMPERATURE NUCLEATION CACO3 MONOHYDROCALCITE Boon, Matthew Rickard, William Rohl, Andrew Jones, Franca Stabilization of Aragonite: Role of Mg2+ and Other Impurity Ions |
| title | Stabilization of Aragonite: Role of Mg2+ and Other Impurity Ions |
| title_full | Stabilization of Aragonite: Role of Mg2+ and Other Impurity Ions |
| title_fullStr | Stabilization of Aragonite: Role of Mg2+ and Other Impurity Ions |
| title_full_unstemmed | Stabilization of Aragonite: Role of Mg2+ and Other Impurity Ions |
| title_short | Stabilization of Aragonite: Role of Mg2+ and Other Impurity Ions |
| title_sort | stabilization of aragonite: role of mg2+ and other impurity ions |
| topic | Science & Technology Physical Sciences Technology Chemistry, Multidisciplinary Crystallography Materials Science, Multidisciplinary Chemistry Materials Science AMORPHOUS CALCIUM-CARBONATE PRECIPITATION KINETICS ARTIFICIAL SEAWATER SULFATE MAGNESIUM CRYSTALLIZATION TEMPERATURE NUCLEATION CACO3 MONOHYDROCALCITE |
| url | http://purl.org/au-research/grants/arc/LE0775551 http://purl.org/au-research/grants/arc/LE0775551 http://purl.org/au-research/grants/arc/LE0775551 http://hdl.handle.net/20.500.11937/80957 |