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Hydrothermal Atomic Force Microscopy Investigation of Barite Growth: The Role of Spectator Ions in Elementary Step Edge Growth Kinetics and Hillock Morphology

Jindra, Sarah A.
http://rave.ohiolink.edu/etdc/view?acc_num=wright1503503972572962

Abstract Details

2017, Master of Science (MS), Wright State University, Chemistry.
To better understand the role of spectator ions in barite growth, the kinetics of step edge growth on barite (001) surfaces were studied under various salt solutions. Hydrothermal Atomic Force Microscopy (HAFM) was used to investigate the effect of background electrolytes (NaCl, NaBr and NaNO3) as a function of saturation index and ionic strength (I) on barite growth sourced at dislocations at 108 oC. Results show that hillock morphology is affected by I, as well as type of anion, where the prevalence of steps aligned on the [010] direction is highest under Cl-. There is a modest increase in kinetic coefficient of 55-130% with a ten-fold increase in I for each salt. In comparing the kinetic coefficients of the salts at low ionic strength (0.01 M), there is a moderate difference, suggesting that the anion may play a role in barium attachment.
Steven Higgins, Ph.D. (Advisor)
David Dolson, Ph.D. (Committee Member)
Ioana Sizemore, Ph.D. (Committee Member)
98 p.
Chemistry; Geochemistry
chemistry; geochemistry

Recommended Citations

Citations

  • Jindra, S. A. (2017). Hydrothermal Atomic Force Microscopy Investigation of Barite Growth: The Role of Spectator Ions in Elementary Step Edge Growth Kinetics and Hillock Morphology [Master's thesis, Wright State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=wright1503503972572962

    APA Style (7th edition)

  • Jindra, Sarah. Hydrothermal Atomic Force Microscopy Investigation of Barite Growth: The Role of Spectator Ions in Elementary Step Edge Growth Kinetics and Hillock Morphology. 2017. Wright State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=wright1503503972572962.

    MLA Style (8th edition)

  • Jindra, Sarah. "Hydrothermal Atomic Force Microscopy Investigation of Barite Growth: The Role of Spectator Ions in Elementary Step Edge Growth Kinetics and Hillock Morphology." Master's thesis, Wright State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1503503972572962

    Chicago Manual of Style (17th edition)

wright1503503972572962
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© 2017, all rights reserved.
This open access ETD is published by Wright State University and OhioLINK.