Andrew G Stack

Andrew G Stack

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)
ERKCG08 - Interfacial Dynamics in Radioactive Environments and Materials (Energy Frontier Research Center)
CEED500 - Critical Materials Institute (Energy Innovation Hub)


  1. Stack, A. G.; Stubbs, J. E.; Srinivasan, S. G.; Roy, S.; Bryantsev, V. S.; Eng, P. J.; Custelcean, R.; Gordon, A. D.; Hexel, C. R. (2018) Mineral-Water Interface Structure of Xenotime (YPO4) {100}. J. Phys. Chem. C  122, 20232-20243 DOI:10.1021/acs.jpcc.8b04015

  2. Weber, J.; Bracco, J. N.; Poplawsky, J. D.; Ievlev, A.; More, K. L.; Lorenz, M.; Bertagni, A. L.; Jindra, S. A.; Starchenko, V.; Higgins, S. R.; Stack, A. G.  (2018) Unraveling the Effects of Strontium Incorporation on Barite Growth – In-situ and Ex-situ Observations using Multi-Scale Chemical Imaging.  Cryst. Growth Des. 18, 5521-5533 DOI: 10.1021/acs.cgd.8b00839

  3. Wang, H.-W.; Vlcek, L.; Neuefeind, J.; Page, K.; Irle, S.; Simonson, J. S.; Stack, A. G. (2018) Decoding Oxyanion Aqueous Solvation Structure: A Potassium-Nitrate Example at Saturation.  J. Phys. Chem. B. 122, 7584-7589 DOI: 10.1021/acs.jpcb.8b05895

  4. Graham, T. R.; Dembowski, M.; Martinez-Baez, E.; Zhang, X.; Jaegers, N. R.; Hu, J.; Gruskiewicz, M. S.; Wang, H.-W.; Stack, A. G.; Bowden, M. E.; Delegard, C. H.; Schenter, G. K.; Clark, A. E.; Clark, S. B.; Felmy, A. R.; Rosso, K. M.; Pearce, C. I.  (2018) In-Situ 27Al NMR Spectroscopy of Aluminate in Sodium Hydroxide Solutions Above and Below Saturation with Respect to Gibbsite. Inorg. Chem. 57, 11864-11873 DOI: 10.1021/acs.inorgchem.8b00617

  5. Cheshire, M. C.; Bish, D. L.; Cahil, J. F.; Kertesz, V.; Stack, A. G. (2018) Geochemical evidence for rare-earth element mobilization during kaolin diagenesis.  ACS Earth Space Chem. 2, 503-520 DOI: 10.1021/acsearthspacechem.7b00124

  6. Shen, Z.; Kerisit, S.; Stack, A. G.; Rosso, K. M. (2018) Free-Energy Landscape of the Dissolution of Gibbsite at High pH.  J. Phys. Chem. Lett. 9, 1809-1814.  DOI: 10.1021/acs.jpclett.8b00484

  7. Cao, B.; Stack, A. G.; Steefel, C. I.; DePaolo, D. J.; Lammers, L. N.; Hu, Y.  (2018) Investigating Calcite Growth Rates Using a Quartz Crystal Microbalance with Dissipation (QCM-D).  Geochim. Cosmochim. Acta 222, 269-283. DOI: 10.1016/j.gca.2017.10.020

  8. 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

  9. 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

  10. 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

  11. 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

  12. 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


Facilities Used