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Showing 1–9 of 9 results
Advanced filters: Author: Valerio Cerantola Clear advanced filters

  • Carbonates are shown to exist in the lower mantle as seen in diamond inclusions, but thermodynamic constraints are poorly understood. Here, the authors synthesise two new iron carbonate compounds and find that self-oxidation-reduction reactions can preserve carbonates in the mantle.

    • Valerio Cerantola
    • Elena Bykova
    • Leonid Dubrovinsky
    ResearchOpen Access
    Nature Communications
    Volume: 8, P: 1-9

  • A single ultrashort pulse from X-ray free-electron laser is shown to produce a submicron, with >1,000 length-to-diameter aspect ratio long channel in solid material. The results open a new avenue for development of artificial nanofluidic devices with confinement down to the molecular level.

    • Sergey S. Makarov
    • Vasily V. Zhakhovsky
    • Sergey A. Pikuz
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-13

  • Experiments using high-intensity X-ray pulses incident on high-pressure hydrocarbons suggest that diamond formation can occur at shallower depths in icy planets and may play a role in the internal convection that generates their magnetic fields.

    • Mungo Frost
    • R. Stewart McWilliams
    • Alexander F. Goncharov
    Research
    Nature Astronomy
    Volume: 8, P: 174-181

  • The lowermost mantle and transition zone are increasingly oxidized at depth, according to analyses of the oxidation state of iron in majoritic garnet inclusions from deep diamonds.

    • Ekaterina S. Kiseeva
    • Denis M. Vasiukov
    • Leonid Dubrovinsky
    Research
    Nature Geoscience
    Volume: 11, P: 144-147

  • The charge order transition of commonly known magnetite has only recently been unraveled. Here, the measurement of the low-temperature high-pressure phase diagram of a related material (Fe4O5) elucidates the interplay of average oxidation state and charge-ordering phenomena in the iron oxide family.

    • Sergey V. Ovsyannikov
    • Maxim Bykov
    • Leonid S. Dubrovinsky
    ResearchOpen Access
    Nature Communications
    Volume: 9, P: 1-11

  • This work concerns a systematic study of Fe1-xO employing complementary methods of powder and single-crystal X-ray diffraction and synchrotron Mössbauer source spectroscopy up to 94 GPa and 1700 K. It presents a structural and magnetic transitional pressure-temperature diagram of Fe1-xO and demonstrates the complex physicochemical properties of simple Fe1-xO binary oxide under extreme conditions.

    • Xiang Li
    • Elena Bykova
    • Ilya Kupenko
    ResearchOpen Access
    Communications Physics
    Volume: 7, P: 1-11