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dc.contributor.authorBunney, K.
dc.contributor.authorFreeman, S.
dc.contributor.authorOgden, Mark
dc.contributor.authorRichmond, William
dc.contributor.authorRohl, Andrew
dc.contributor.authorJones, Franca
dc.identifier.citationBunney, K. and Freeman, S. and Ogden, M.I. and Richmond, W.R. and Rohl, A.L. and Jones, F. 2014. Effect of Lanthanum on the Crystal Growth of Barium Sulfate. Crystal Growth & Design. 14 (4): pp. 1650-1658.

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.

dc.publisherAmerican Chemical Society
dc.subjectX ray diffraction Cation substitutions
dc.subjectSulfate levels
dc.subjectPositive ions
dc.subjectSolution phase
dc.subjectIon substitution
dc.subjectAtomic force microscopy
dc.subjectIon-pair interactions
dc.subjectComputational model
dc.subjectVacancy formation
dc.subjectLanthanum ions
dc.titleEffect of Lanthanum on the Crystal Growth of Barium Sulfate
dc.typeJournal Article
dcterms.source.titleCrystal Growth & Design
curtin.accessStatusFulltext not available

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