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Showing 1–7 of 7 results
Advanced filters: Author: H.-P. Liermann Clear advanced filters

  • Fe2O3is known to undergo a series of structural, electronic and magnetic transformations at high pressures and temperatures but these are poorly understood due to a lack of structural data. Here, the authors perform experiments to elucidate the transformations and relationships between them.

    • E. Bykova
    • L. Dubrovinsky
    • V. Prakapenka
    ResearchOpen Access
    Nature Communications
    Volume: 7, P: 1-6

  • A precise structure measurement of liquid carbon at pressures of around 1 million atmospheres obtained by in situ X-ray diffraction at an X-ray free-electron laser shows a complex fluid with transient bonding and approximately four nearest neighbours on average.

    • D. Kraus
    • J. Rips
    • M. I. McMahon
    ResearchOpen Access
    Nature
    Volume: 642, P: 351-355

  • At temperatures and pressures typical of the Earth’s lower mantle, cubic CaSiO3 perovskite is found to have lower strength and viscosity compared to bridgmanite and ferropericlase, providing clues to its role in subduction regions.

    • J. Immoor
    • L. Miyagi
    • H. Marquardt
    Research
    Nature
    Volume: 603, P: 276-279

  • Owing to the energetic nature of N–N bonds, poly-nitrogen compounds are considered promising high energy density materials. Here, the authors synthesize three iron–nitrogen compounds at high pressure, including FeN4, which features polymeric nitrogen chains of [N42−]n units.

    • M. Bykov
    • E. Bykova
    • L. Dubrovinsky
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-8

  • As silica melts are believed to be important components of the Earth’s mantle, their structure should determine many of its properties. Here, the authors identify two crystalline modifications of SiO2, whose local structures closely resemble those of known melts, providing a structural model for their atomic ordering at the nanoscale.

    • E. Bykova
    • M. Bykov
    • L. Dubrovinsky
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-8

  • In spite of its wide technological use, the response of silicon to rapid compression remains poorly understood. By means of an X-ray diffraction method based on a free-electron laser, the process for laser-driven dynamic shock compression is now elucidated in this system.

    • E. E. McBride
    • A. Krygier
    • A. Higginbotham
    Research
    Nature Physics
    Volume: 15, P: 89-94

  • Subtle anomalies in how the structure of metallic osmium evolves with pressure are detected using powder X-ray diffraction measurements at ultra-high static pressures; the anomaly at 440 gigapascals is attributed to an electronic transition caused by pressure-induced interactions between core electrons.

    • L. Dubrovinsky
    • N. Dubrovinskaia
    • I. A. Abrikosov
    Research
    Nature
    Volume: 525, P: 226-229