An atomic force microscopy study of the growth of a calcite surface as a function of calcium/total carbonate concentration ratio in solution at constant supersaturation
Calcite growth experiments using atomic force microscopy (AFM) were conducted at two constant values of supersaturation (Qi = 5.248 and £22 = 6.457) while varying the Ca2+to CO32-concentration ratio. The calcite growth rate and the morphology of growth depend on the solution stoichiometry. At a cons...
| Main Authors: | , , , |
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| Format: | Journal Article |
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American Chemical Society
2009
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| Online Access: | http://hdl.handle.net/20.500.11937/15883 |
| _version_ | 1848749015113400320 |
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| author | Perdikouri, C. Putnis, Christine Kasioptas, A. Putnis, Andrew |
| author_facet | Perdikouri, C. Putnis, Christine Kasioptas, A. Putnis, Andrew |
| author_sort | Perdikouri, C. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Calcite growth experiments using atomic force microscopy (AFM) were conducted at two constant values of supersaturation (Qi = 5.248 and £22 = 6.457) while varying the Ca2+to CO32-concentration ratio. The calcite growth rate and the morphology of growth depend on the solution stoichiometry. At a constant degree of supersaturation, the growth rate was highest when the cation/total carbonate anion ratio, r*, was equal to 1 but decreased nonsymmetrically for higher or lower values of r*. The observed dependence of growth, rates on solution stoichiometry can be explained by nonequivalent attachment frequencies of cation and anion at ratios that differ from 1. At the same time, the morphology of the closing etch pits and of the forming nuclei was different when the rate changed, suggesting a change in the crystal growth mechanism. © 2009 American Chemical Society. |
| first_indexed | 2025-11-14T07:14:13Z |
| format | Journal Article |
| id | curtin-20.500.11937-15883 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:14:13Z |
| publishDate | 2009 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-158832017-09-13T14:08:01Z An atomic force microscopy study of the growth of a calcite surface as a function of calcium/total carbonate concentration ratio in solution at constant supersaturation Perdikouri, C. Putnis, Christine Kasioptas, A. Putnis, Andrew Calcite growth experiments using atomic force microscopy (AFM) were conducted at two constant values of supersaturation (Qi = 5.248 and £22 = 6.457) while varying the Ca2+to CO32-concentration ratio. The calcite growth rate and the morphology of growth depend on the solution stoichiometry. At a constant degree of supersaturation, the growth rate was highest when the cation/total carbonate anion ratio, r*, was equal to 1 but decreased nonsymmetrically for higher or lower values of r*. The observed dependence of growth, rates on solution stoichiometry can be explained by nonequivalent attachment frequencies of cation and anion at ratios that differ from 1. At the same time, the morphology of the closing etch pits and of the forming nuclei was different when the rate changed, suggesting a change in the crystal growth mechanism. © 2009 American Chemical Society. 2009 Journal Article http://hdl.handle.net/20.500.11937/15883 10.1021/cg900200s American Chemical Society restricted |
| spellingShingle | Perdikouri, C. Putnis, Christine Kasioptas, A. Putnis, Andrew An atomic force microscopy study of the growth of a calcite surface as a function of calcium/total carbonate concentration ratio in solution at constant supersaturation |
| title | An atomic force microscopy study of the growth of a calcite surface as a function of calcium/total carbonate concentration ratio in solution at constant supersaturation |
| title_full | An atomic force microscopy study of the growth of a calcite surface as a function of calcium/total carbonate concentration ratio in solution at constant supersaturation |
| title_fullStr | An atomic force microscopy study of the growth of a calcite surface as a function of calcium/total carbonate concentration ratio in solution at constant supersaturation |
| title_full_unstemmed | An atomic force microscopy study of the growth of a calcite surface as a function of calcium/total carbonate concentration ratio in solution at constant supersaturation |
| title_short | An atomic force microscopy study of the growth of a calcite surface as a function of calcium/total carbonate concentration ratio in solution at constant supersaturation |
| title_sort | atomic force microscopy study of the growth of a calcite surface as a function of calcium/total carbonate concentration ratio in solution at constant supersaturation |
| url | http://hdl.handle.net/20.500.11937/15883 |