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Structural evolution of liquid silicates under conditions in Super-Earth interiors

Author

Listed:
  • Guillaume Morard

    (CNRS
    de Physique des Matériaux et de Cosmochimie)

  • Jean-Alexis Hernandez

    (European Synchrotron Radiation Facility)

  • Clara Pege

    (CNRS)

  • Charlotte Nagy

    (CNRS)

  • Lélia Libon

    (CNRS
    de Physique des Matériaux et de Cosmochimie)

  • Antoine Lacquement

    (European Synchrotron Radiation Facility)

  • Dimosthenis Sokaras

    (SLAC National Accelerator Laboratory)

  • Hae Ja Lee

    (SLAC National Accelerator Laboratory)

  • Eric Galtier

    (SLAC National Accelerator Laboratory)

  • Philip Heimann

    (SLAC National Accelerator Laboratory)

  • Eric Cunningham

    (SLAC National Accelerator Laboratory)

  • Siegfried H. Glenzer

    (SLAC National Accelerator Laboratory)

  • Tommaso Vinci

    (Sorbonne Université)

  • Clemens Prescher

    (University of Freiburg)

  • Silvia Boccato

    (de Physique des Matériaux et de Cosmochimie)

  • Julien Chantel

    (UMR 8207—UMET—Unité Matériaux et Transformations)

  • Sébastien Merkel

    (UMR 8207—UMET—Unité Matériaux et Transformations)

  • Yanyao Zhang

    (Stanford University)

  • Hong Yang

    (Stanford University)

  • Xuehui Wei

    (Arizona State University)

  • Silvia Pandolfi

    (de Physique des Matériaux et de Cosmochimie
    SLAC National Accelerator Laboratory)

  • Wendy L. Mao

    (SLAC National Accelerator Laboratory
    Stanford University)

  • Arianna E. Gleason

    (SLAC National Accelerator Laboratory
    Stanford University)

  • Sang Heon Shim

    (Arizona State University)

  • Roberto Alonso-Mori

    (SLAC National Accelerator Laboratory)

  • Alessandra Ravasio

    (Sorbonne Université)

Abstract

Molten silicates at depth are crucial for planetary evolution, yet their local structure and physical properties under extreme conditions remain elusive due to experimental challenges. In this study, we utilize in situ X-ray diffraction (XRD) at the Matter in Extreme Conditions (MEC) end-station of the Linear Coherent Linac Source (LCLS) at SLAC National Accelerator Laboratory to investigate liquid silicates. Using an ultrabright X-ray source and a high-power optical laser, we probed the local atomic arrangement of shock-compressed liquid (Mg,Fe)SiO3 with varying Fe content, at pressures from 81(9) to 385(40) GPa. We compared these findings to ab initio molecular dynamics simulations under similar conditions. Results indicate continuous densification of the O-O and Mg-Si networks beyond Earth’s interior pressure range, potentially altering melt properties at extreme conditions. This could have significant implications for early planetary evolution, leading to notable differences in differentiation processes between smaller rocky planets, such as Earth and Venus, and super-Earths, which are exoplanets with masses nearly three times that of Earth.

Suggested Citation

  • Guillaume Morard & Jean-Alexis Hernandez & Clara Pege & Charlotte Nagy & Lélia Libon & Antoine Lacquement & Dimosthenis Sokaras & Hae Ja Lee & Eric Galtier & Philip Heimann & Eric Cunningham & Siegfri, 2024. "Structural evolution of liquid silicates under conditions in Super-Earth interiors," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-51796-7
    DOI: 10.1038/s41467-024-51796-7
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    References listed on IDEAS

    as
    1. M. Guarguaglini & F. Soubiran & J.-A. Hernandez & A. Benuzzi-Mounaix & R. Bolis & E. Brambrink & T. Vinci & A. Ravasio, 2021. "Electrical conductivity of warm dense silica from double-shock experiments," Nature Communications, Nature, vol. 12(1), pages 1-8, December.
    2. Chrystèle Sanloup & James W. E. Drewitt & Zuzana Konôpková & Philip Dalladay-Simpson & Donna M. Morton & Nachiketa Rai & Wim van Westrenen & Wolfgang Morgenroth, 2013. "Structural change in molten basalt at deep mantle conditions," Nature, Nature, vol. 503(7474), pages 104-107, November.
    3. Richard C. Greenwood & Ian A. Franchi & Albert Jambon & Paul C. Buchanan, 2005. "Widespread magma oceans on asteroidal bodies in the early Solar System," Nature, Nature, vol. 435(7044), pages 916-918, June.
    Full references (including those not matched with items on IDEAS)

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