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NMR and Computational Studies of Ba8Ga16Sn30 Clathrates

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We have synthesized type-VIII and type-I Ba8Ga16Sn30 clathrates by using different annealing treatments, confirmed with XRD and electron microprobe measurements. NMR lineshape measurements identified a broad resonance corresponding to first-order-shifted satellites. Simulations for the type I structure based on first principles calculations provided an excellent fit to the data, with the best agreement provided by the calculated lowest-energy configuration, having no Ga-Ga bonds. These results allow us to address local configurations within the random type-I alloy, as well as atomic displacements and bond-length distributions, which we compare to experiment.

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Authors and Affiliations

  1. Department of Physics and Astronomy, Texas A&M University, 77843-4242, College Station, TX, U.S.A.

    Sergio Y. Rodriguez, Xiang Zheng & Joseph H. Ross Jr.

  2. Material Science and Engineering Program, Texas A&M University, 77843, College Station, TX, U.S.A.

    Xiang Zheng & Joseph H. Ross Jr.

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  1. Sergio Y. Rodriguez
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  2. Xiang Zheng
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  3. Joseph H. Ross Jr.
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Rodriguez, S.Y., Zheng, X. & Ross, J.H. NMR and Computational Studies of Ba8Ga16Sn30 Clathrates. MRS Online Proceedings Library 1267, 407 (2010). https://doi.org/10.1557/PROC-1267-DD04-07

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  • DOI: https://doi.org/10.1557/PROC-1267-DD04-07

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