Andrew G Stack

Andrew G Stack

Acting Division Director, Chemical Sciences; Group Leader, Geochemistry & Interfacial Sciences


Andrew G. Stack focuses on understanding how minerals react with their surrounding solutions. He is the PI of the Basic Energy Sciences Geosciences project at ORNL, entitled "Atomic- to Pore-Scale Geochemical Processes."


Outstanding Contributions to Geosciences Research Award (2014). U.S. DOE Basic Energy Sciences, Geosciences Program

Award for One of Top 14 Technical Presentations (out of > 300), Twelfth Annual Conference on Carbon Capture, Utilization & Sequestration. Pittsburgh, PA, May 13-16, 2013

Profile featured at ORNL web-site: Part I, Part II and STEM Magazine (2015).

Profile featured in American Chemical Society’s College-To-Career web-site.

Finalist for Asylum Research AFM Image Contest


ERKCC72 - Atomic- to Pore-Scale Geochemical Processes (BES Geosciences)
ERKCC67 - Nanoscale Control of Geologic CO2 (Energy Frontier Research Center)
CEED500 - Critical Materials Institute (Energy Innovation Hub)
ERKCG08 - Interfacial Dynamics in Radioactive Environments and Materials (Energy Frontier Research Center)


  1. Bracco, J. N.; Lee, S. S.; Stubbs, J. E.; Eng, P. J.; Heberling, F.; Fenter, P.; Stack, A. G. (2017)  Hydration Structure of the Barite (001)-Water Interface: Comparison of X-ray Reflectivity with Molecular Dynamics Simulations.  J. Phys. Chem. C  122, 12236-12248 DOI: 10.1021/acs.jpcc.7b02943

  2. De La Pierre, M.; Raiteri, A. G.; Stack, A. G.; Gale, J. D. (2017) Uncovering the atomistic mechanism for calcite step growth.  Angew. Chem. Int’l. Ed. 56, 8464-8467 DOI: 10.1002/ange.201701701

  3. Srinivasan, S. G.; Shivaramaiah, R.; Kent, P. R. C.; Stack, A. G., Riman, R. E.; Anderko, A.; Navrotsky, A.; Bryantsev, V. S. (2017) A Comparative Study of Surface Energies and Water Adsorption on Ce-Bastnästite, La-Bastnästite, and Calcite via Density Functional Theory and Water Adsorption Calorimetry.  Phys. Chem. Chem. Phys.  19(11), 7820-7832.  DOI: 10.1039/C7CP00811B

  4. Wang, H.-W.; Daemen, L. L.; Cheshire, M. C.; Kidder, M. K.; Stack, A. G.; Allard, L. F.; Neuefeind, J.; Olds, D.; Liu, J.; Page, K. (2017) Synthesis and structure of synthetically pure and deuterated amorphous (basic) calcium carbonates.  Chem. Comm. 53, 2942-2945.  DOI: 10.1039/C6CC08848A

  5. Cheshire, M. C.; Stack, A. G.; Carey, J. W.; Anovitz, L. M.; Prisk, T. R.; Ilavsky, J. (2017) Wellbore Cement Porosity Evolution in Response to Mineral Alteration During CO2 Flooding. Environ. Sci. Technol. 51, 692-698 DOI: 10.1021/acs.est.6b03290

  6. Stack, A. G.; Borreguero, J. M.; Prisk, T. R.; Mamontov, E.; Wang, H.-W.; Vlcek, L.; Wesolowski, D. J. (2016) Precise determination of water exchanges on a mineral surface.  Phys. Chem. Chem. Phys. 18, 28817-28828 DOI: 10.1039/C6CP05836A

  7. DiStefano, V. H.; McFarlane, J.; Anovitz, L. M.; Stack, A. G.; Gordon, A. D.; Littrell, K. C.; Chipera, S. J.; Hunt, R. D.; Lewis, S. A.; Hale, R. E.; Perfect, E. (2016) Extraction of organic compounds from representative shales and the effect on porosity.  J. Nat. Gas. Sci. Engr., 35, 646-660 DOI: 10.1016/j.jngse.2016.08.064

  8. Godinho, J. R. A.; Gehrke, K. M.; Stack, A. G.; Lee, P. D. (2016)  The dynamic nature of crystal growth in pores.  Sci. Rep., 6:33086 DOI: 10.1038/srep33086 

  9. Srinivasan, S. G.; Shivaramaiah, R.; Kent, P. R. C.; Stack, A. G., Navrotsky, A.; Riman, R. E. Anderko, A.; Bryantsev, V. S. (2016) Crystal Structures, Surface Stability and Water Adsorption Energies of La-Bastnäsite via Density Functional Theory and Experimental Studies.  J. Phys. Chem. C, 120, 2811-2829, DOI: 10.1021/acs.jpcc.6b04747

  10. Dai, C.; Stack, A. G.; Koishi, A.; Fernandez-Martinez, A.; Lee, S. S.; Hu, Y. (2016) Heterogeneous Nucleation and Growth of Barium Sulfate at Organic-Water Interfaces: Interplay between Surface Hydrophobicity and Ba2+ Adsorption.  Langmuir 32, 5277-5284 DOI: 10.1021/acs.langmuir.6b01036 

  11. Zachara, J.; Brantley, S.; Chorover, J.; Ewing, R.; Kerisit, S.; Liu, C.; Perfect, E.; Rother, G.; Stack, A. G. (2016)  Internal Domains of Natural Porous Media Revealed: Critical Locations for Transport, Storage, and Chemical Reaction.  Environ. Sci. Technol. 50, 2811-2829 DOI: 10.1021/acs.est.5b05015

  12. Stack, A. G. (2015) Precipitation in Pores:  A Geochemical Frontier.  Rev. Mineral. Geochem.  80, 165-190 DOI: 10.2138/rmg.2015.80.05 (#1 or #2 most highly read RiMG article Sept., 2015 - Dec., 2015).

  13. Godinho, J. R. A.; Stack, A. G. (2015) Growth kinetics and morphology of barite crystals derived from face-specific growth rates.  Cryst. Growth Des. 15, 2064-2071 DOI: 10.1021/cg501507p

  14. Stack, A. G.; Kent, P. R. C. (2015) Geochemical Reaction Mechanism Discovery from Molecular Simulation.  Environ. Chem. 12, 20-32.  DOI: 10.1071/EN14045

  15. Hatzell, M. C.; Raju, M.; Watson, V. J.; Stack, A. G.; van Duin, A. C. T.; Logan, B. E. (2014) Effect of Strong Acid Functional Groups on Electrode Rise Potential in Capacitive Mixing by Double Layer Expansion.  Environ. Sci. Technol. 48, 14041-14048.  DOI: 10.1021/es5043782

Facilities Used