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Meeting Materials Science & Technology 2020
Symposium Emergent Materials under Extremes and Decisive In Situ Characterizations
Presentation Title Characterizing Disordered Crystalline Materials with Pauling’s Rules
Author(s) Eric O'Quinn, Kurt Sickafus, Rodney Ewing, Gianguido Baldinozzi, Joerg Neuefeind, Matthew Tucker, Antonio Fuentes, Devon Drey, Maik Lang
On-Site Speaker (Planned) Eric O'Quinn
Abstract Scope Recently, there has been an increased focus on understanding the structural details of disordered materials which are found across all energy technologies [Shamblin et al., Nat. Mater. 2016]. Despite the importance of these materials, there is still little knowledge about the atomic-scale rules governing disordering processes. Here, we present results from neutron total scattering experiments from spinel (AB2O4) and pyrochlore (A2B2O7) model systems which reveal that short-range ordering and associated structural relaxations in disordered materials can be understood as an extension of Pauling’s rules [Pauling, J. Am. Chem. Soc. 1929]. These rules apply whether disorder is induced intrinsically (e.g., chemical substitution), extrinsically (high temperature), or even by highly non-equilibrium conditions (high-energy ion irradiation and mechanical milling). These results provide a framework that can be utilized to predict the atomic configuration in disordered materials, including those that result from exposure to extreme conditions [O’Quinn et al., In review, Nat. Commun. 2020].


Characterizing Disordered Crystalline Materials with Pauling’s Rules
Evolution of Structure, Electrical, and Optical Properties in Ti-doped In2O3 Nanocrystals under Pressure
Giant Pressure-induced Enhancements in Electronic Transport and Photoelectric Properties in 2D and 3D Structures
High-speed X-ray Phase Contrast Imaging Analysis of Microscale Shock Response of a Mock Additively Manufactured Energetic Material
High Pressure & Temperature Investigation into Thorium Orthosilicates
Investigations of Materials under Extreme Hydrothermal Conditions Using Synchrotron and Complementary Techniques
Technology Development of In-situ Corrosion Kinetics and Salt Property Measurements

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