Effect of Lanthanum on the Crystal Growth of Barium Sulfate
Dipositive cation substitution in sulfate minerals has been a topic of investigation both experimentally and computationally. Here the possibility of tripositive cation substitution with accompanying vacancy formation is considered, specifically lanthanum ion substitution in barium sulfate. Experime...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
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American Chemical Society
2014
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| Online Access: | http://hdl.handle.net/20.500.11937/18849 |
| _version_ | 1848749864539652096 |
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| author | Bunney, K. Freeman, S. Ogden, Mark Richmond, William Rohl, Andrew Jones, Franca |
| author_facet | Bunney, K. Freeman, S. Ogden, Mark Richmond, William Rohl, Andrew Jones, Franca |
| author_sort | Bunney, K. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Dipositive cation substitution in sulfate minerals has been a topic of investigation both experimentally and computationally. Here the possibility of tripositive cation substitution with accompanying vacancy formation is considered, specifically lanthanum ion substitution in barium sulfate. Experimentally, the lanthanum ions impact "bulk" crystallization in a way that is best explained by considering the solution phase ion-pair interactions. However, morphological results suggest that lanthanum ions do more than impact the free sulfate levels. Atomic force microscopy results showed that both lanthanum and calcium ions are strong inhibitors of barite growth. X-ray diffraction on bulk samples showed that lanthanum ions do indeed incorporate, as determined by lattice parameter changes. Finally, computational modeling suggests that while calcium incorporation is more energetically favorable, lanthanum ions prefer to substitute on the surface more so than calcium ions. |
| first_indexed | 2025-11-14T07:27:43Z |
| format | Journal Article |
| id | curtin-20.500.11937-18849 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:27:43Z |
| publishDate | 2014 |
| publisher | American Chemical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-188492021-12-01T04:26:57Z Effect of Lanthanum on the Crystal Growth of Barium Sulfate Bunney, K. Freeman, S. Ogden, Mark Richmond, William Rohl, Andrew Jones, Franca X ray diffraction Cation substitutions Sulfate levels Positive ions Solution phase Barium Ion substitution Atomic force microscopy Ion-pair interactions Computational model Vacancy formation Lanthanum ions Dipositive cation substitution in sulfate minerals has been a topic of investigation both experimentally and computationally. Here the possibility of tripositive cation substitution with accompanying vacancy formation is considered, specifically lanthanum ion substitution in barium sulfate. Experimentally, the lanthanum ions impact "bulk" crystallization in a way that is best explained by considering the solution phase ion-pair interactions. However, morphological results suggest that lanthanum ions do more than impact the free sulfate levels. Atomic force microscopy results showed that both lanthanum and calcium ions are strong inhibitors of barite growth. X-ray diffraction on bulk samples showed that lanthanum ions do indeed incorporate, as determined by lattice parameter changes. Finally, computational modeling suggests that while calcium incorporation is more energetically favorable, lanthanum ions prefer to substitute on the surface more so than calcium ions. 2014 Journal Article http://hdl.handle.net/20.500.11937/18849 10.1021/cg401776e American Chemical Society restricted |
| spellingShingle | X ray diffraction Cation substitutions Sulfate levels Positive ions Solution phase Barium Ion substitution Atomic force microscopy Ion-pair interactions Computational model Vacancy formation Lanthanum ions Bunney, K. Freeman, S. Ogden, Mark Richmond, William Rohl, Andrew Jones, Franca Effect of Lanthanum on the Crystal Growth of Barium Sulfate |
| title | Effect of Lanthanum on the Crystal Growth of Barium Sulfate |
| title_full | Effect of Lanthanum on the Crystal Growth of Barium Sulfate |
| title_fullStr | Effect of Lanthanum on the Crystal Growth of Barium Sulfate |
| title_full_unstemmed | Effect of Lanthanum on the Crystal Growth of Barium Sulfate |
| title_short | Effect of Lanthanum on the Crystal Growth of Barium Sulfate |
| title_sort | effect of lanthanum on the crystal growth of barium sulfate |
| topic | X ray diffraction Cation substitutions Sulfate levels Positive ions Solution phase Barium Ion substitution Atomic force microscopy Ion-pair interactions Computational model Vacancy formation Lanthanum ions |
| url | http://hdl.handle.net/20.500.11937/18849 |