Andrew G Stack Group Leader, Geochemistry & Interfacial Sciences Contact stackag@ornl.gov | 865.574.8450 All Publications 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 F... 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... Ultra-efficient polymer binder for silicon anode in high-capacity lithium-ion batteries... Grain Detachment and Transport Clogging During Mineral Dissolution in Carbonate Rocks with Permeable Grain Boundaries... Water Uptake by Silica Nanopores: Impacts of Surface Hydrophilicity and Pore Size... Molecular Recognition at Mineral Interfaces: Implications for the Beneficiation of Rare Earth Ores Hydration Structure and Water Exchange Kinetics at Xenotime–water Interfaces: Implications for Rare Earth Minerals Separati... Controls of Microstructure and Chemical Reactivity on the Replacement of Limestone by Fluorite Studied Using Spatially Resolved Small Angle X-ray and Neutron Scattering Adsorption mechanism of alkyl hydroxamic acid onto bastnäsite: Fundamental steps toward rational collector design for rare e... Countercations Control Local Specific Bonding Interactions and Nucleation Mechanisms in Concentrated Water-in-Salt Solutions... Organic–mineral interfacial chemistry drives heterogeneous nucleation of Sr-rich (Bax, Sr1−x)SO4 from undersaturated solu... Simultaneous Adsorption and Incorporation of Sr 2+ at the Barite (001)–Water Interface... Coupled Multimodal Dynamics of Hydrogen-containing Ion Networks In Water-deficient, Sodium Hydroxide-aluminate Solutions Solvent-pore interactions in the Eagle Ford shale formation... Effects of Ionic Strength, Salt, and pH on Aggregation of Boehmite Nanocrystals: Tumbler Small-Angle Neutron and X-ray Scatte... Mineral–Water Interface Structure of Xenotime (YPO4) {100}... Pagination First page « First Previous page ‹‹ Page 1 Current page 2 Page 3 … Next page ›› Last page Last » Key Links Curriculum Vitae ORCID Google Scholar Organizations Physical Sciences Directorate Chemical Sciences Division Chemical Transformations Section Geochemistry and Interfacial Science Group