Andrew G Stack Group Leader, Geochemistry & Interfacial Sciences Contact 865.574.8450 | STACKAG@ORNL.GOV All Publications Synergistic Enhancement of Lead and Selenate Uptake at the Barite (001)–Water Interface Selenite and Selenate Sequestration during Coprecipitation with Barite: Insights from Mineralization Processes of Adsorption, Nucleation, and Growth In Situ Observations of Barium Sulfate Nucleation in Nanopores Nucleation Rate Theory for Coordination Number: Elucidating Water-Mediated Formation of a Zigzag Na2SO4 Morphology Structure and reactivity of sodium aluminate complexes in alkaline solutions Concentration dependent interfacial chemistry of the NaOH(aq): gibbsite interface Nanopore facilitated monohydrocalcitic amorphous calcium carbonate precipitation Numerical Study of Mineral Nucleation and Growth on a Substrate The “good,” the “bad,” and the “hidden” in neutron scattering and molecular dynamics of ionic aqueous solutions Radiolysis and Radiation-Driven Dynamics of Boehmite Dissolution Observed by In Situ Liquid-Phase TEM Improving Rare-Earth Mineral Separation with Insights from Molecular Recognition: Functionalized Hydroxamic Acid Adsorption onto Bastnäsite and Calcite Frustrated Coulombic and Cation Size Effects on Nanoscale Boehmite Aggregation: A Tumbler Small- and Ultra-Small-Angle Neutron Scattering Study Molecular Structure of Adsorbed Water Phases in Silica Nanopores Solution and Interface Structure and Dynamics in Geochemistry: Gateway to Link Elementary Processes to Mineral Nucleation and Growth Local molecular environment drives speciation and reactivity of ion complexes in concentrated salt solution Opposing Effects of Impurity Ion Sr2+ on the Heterogeneous Nucleation and Growth of Barite (BaSO4) Density Functional Tight-Binding Simulations Reveal the Presence of Surface Defects on the Quartz (101)–Water Interface Nanoscale Structure and Dynamics in Geochemical Systems Influence of microstructure on replacement and porosity generation during experimental dolomitization of limestones Long-Term 13 C Uptake by 12 C-Enriched Calcite Micro-continuum approach for mineral precipitation Moving beyond the Solvent-Tip Approximation to Determine Site-Specific Variations of Interfacial Water Structure through 3D Force Microscopy Moving beyond the Solvent-Tip Approximation to Determine Site-Specific Variations of Interfacial Water Structure through 3D F... A Molecular-Scale Approach to Rare-Earth Beneficiation: Thinking Small to Avoid Large Losses Pb Sorption at the Barite (001)–Water Interface Pagination First page « First Previous page ‹â¶Äą Page 1 Current page 2 Page 3 … Next page ›â¶Äş Last page Last » Key Links Curriculum Vitae Organizations Physical Sciences Directorate Chemical Sciences Division Chemical Transformations Section Geochemistry and Interfacial Science Group
