Publication Date


Document Type


Committee Members

Steven Higgins, Ph.D. (Advisor); David Dolson, Ph.D. (Committee Member); Ioana Pavel, Ph.D. (Committee Member)

Degree Name

Master of Science (MS)


In order to develop a better understanding heterogeneous nucleation of barite, barite precipitation was studied under varying experimental parameters. Hydrothermal atomic force microscopy (HAFM) and optical microscopy were used to investigate the effect of change in temperature, supersaturation and varying ratios of ions on heterogeneous nucleation of barite. In the experiments conducted at higher temperatures, the particles thus nucleated were found to display characteristic hexagonal and rhomboidal shapes. In comparing results of particle densities among different ion ratios, there is evidence suggesting that barium to sulfate ratio plays a role of promoter. Wherein, the ratios with higher [Ba2+] concentration were found to show more nucleation occurring. Although, the HAFM cell was used for experimentation, optical microscopy turned out to be a more effective method for analysis of samples.

Page Count


Department or Program

Department of Chemistry

Year Degree Awarded


Included in

Chemistry Commons