Evaluating structure selection in the hydrothermal growth of FeS₂ pyrite and marcasite
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Evaluating structure.pdf
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646.29 KB
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Adobe PDF
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Author(s)
Kitchaev, Daniil Andreevich
Ceder, Gerbrand
Date Issued
December 2016
Journal
Nature Communications
Publisher
Nature Publishing Group
Citation
Kitchaev, Daniil A., and Gerbrand Ceder. “Evaluating Structure Selection in the Hydrothermal Growth of FeS2 Pyrite and Marcasite.” Nature Communications 7 (December 14, 2016): 13799.
Version
Final published version
Abstract
While the ab initio prediction of the properties of solids and their optimization towards new proposed materials is becoming established, little predictive theory exists as to which metastable materials can be made and how, impeding their experimental realization. Here we propose a quasi-thermodynamic framework for predicting the hydrothermal synthetic accessibility of metastable materials and apply this model to understanding the phase selection between the pyrite and marcasite polymorphs of FeS₂. We demonstrate that phase selection in this system can be explained by the surface stability of the two phases as a function of ambient pH within nano-size regimes relevant to nucleation. This result suggests that a first-principles understanding of nano-size phase stability in realistic synthesis environments can serve to explain or predict the synthetic accessibility of structural polymorphs, providing a guideline to experimental synthesis via efficient computational materials design.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Creative Commons Attribution 4.0 International License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1038/ncomms13799
