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Showing 1–9 of 9 results
Advanced filters: Author: Ilya Kupenko Clear advanced filters

  • High-pressure-temperature experiments that explore the impact of carbon and silicon on the plastic deformation of hexagonal close-packed iron suggest depth-dependent elastic anisotropy in Earth’s inner core may originate from chemical stratification

    • Efim Kolesnikov
    • Xiang Li
    • Ilya Kupenko
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-11

  • Using in situ high pressure measurements, the structure and density of a sulfide phase with the formula Fe4+xS3 have been determined. The thermal stability of this phase makes it a potential candidate to form a Martian inner core.

    • Lianjie Man
    • Xiang Li
    • Daniel. J. Frost
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-9

  • 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

  • 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

  • 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

  • Although it was assumed for decades that the Earth’s mantle could not be magnetic, recent evidence suggests that parts of the upper mantle have magnetic remanence. This Review critically revisits mantle magnetism, discusses recent magnetic data and identifies unresolved questions about the sources of this magnetism.

    • Eric C. Ferré
    • Ilya Kupenko
    • Carmen Sanchez-Valle
    Reviews
    Nature Reviews Earth & Environment
    Volume: 2, P: 59-69