X-Ray Diffraction of Solid Tin to 1.2 TPa

Physical Review Letters
A LazickiJ H Eggert

Abstract

We report direct in situ measurements of the crystal structure of tin between 0.12 and 1.2 TPa, the highest stress at which a crystal structure has ever been observed. Using angle-dispersive powder x-ray diffraction, we find that dynamically compressed Sn transforms to the body-centered-cubic (bcc) structure previously identified by ambient-temperature quasistatic-compression studies and by zero-kelvin density-functional theory predictions between 0.06 and 0.16 TPa. However, we observe no evidence for the hexagonal close-packed (hcp) phase found by those studies to be stable above 0.16 TPa. Instead, our results are consistent with bcc up to 1.2 TPa. We conjecture that at high temperature bcc is stabilized relative to hcp due to differences in vibrational free energy.

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Citations

Jul 1, 2016·Proceedings of the National Academy of Sciences of the United States of America·Adrien DenoeudGuillaume Morard
Oct 24, 2017·Reports on Progress in Physics·E A SeddonW Wurth
Jan 3, 2020·The Review of Scientific Instruments·F CoppariJ H Eggert
Aug 9, 2020·Scientific Reports·D McGonegleJ S Wark
Sep 3, 2017·The Review of Scientific Instruments·F CoppariM B Schneider
Jan 25, 2020·Physical Review Letters·D E FratanduonoJ H Eggert
May 3, 2020·The Review of Scientific Instruments·J R RyggJ H Eggert
Sep 26, 2020·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Nikolai A Smirnov
Jan 29, 2021·Nature·A LazickiJ S Wark
Jan 31, 2021·The Review of Scientific Instruments·A DenoeudE Brambrink
Jul 10, 2021·The Journal of Chemical Physics·Liam C KelsallEugene Gregoryanz

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