{
  "abstract": "High-level radioactive waste requires long-term isolation, motivating the development of durable materials beyond conventional glass matrices, which are thermodynamically metastable. Crystalline ceramics, particularly fluorite-derived oxides, are promising due to their stability, radiation tolerance, and capacity to incorporate radionuclides. In this study, we performed swift heavy ion irradiation into β-Sc2Hf7O17, one of the fluorite structural derivatives in the Sc2O3–HfO2 pseudo-binary system, and investigated its order-to-disordered phase transformation by transmission electron microscopy (TEM). The rhombohedral ordered β-phase transformed into a cubic disordered phase due to damage accumulation. Electron diffraction experiments and dark-field TEM observations revealed the formation of an intermediate phase with an ordered structure distinct from both the β-phase and the other equilibrium phases present in the phase diagram. Irradiation-induced evolution in these materials is complex, involving not only disorder and amorphization but also the formation of intermediate ordered phases and nanoscale heterogeneity. Model systems such as β-Sc2Hf7O17 provide insight into these processes, revealing that local ordering can persist or re-emerge under irradiation, potentially enhancing defect accommodation and delaying structural degradation. This highlights the importance of understanding defect dynamics, local structure, and interfacial effects in designing radiation-resistant waste forms capable of maintaining integrity over geological timescales.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 6,
  "authors": [
    {
      "name": "Yugo Noguchi"
    },
    {
      "name": "Kohei Kawamura"
    },
    {
      "name": "Maulik Patel"
    },
    {
      "name": "Gianguido Baldinozzi"
    },
    {
      "name": "Clara Grygiel"
    },
    {
      "name": "Manabu Ishimaru"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8618sz7nztq8q.bib",
  "cited_by": 0,
  "doi": "10.1063/5.0347406",
  "fulltext_url": null,
  "id": "8618sz7nztq8q",
  "issns": [
    "0021-8979",
    "1089-7550"
  ],
  "landing_url": "https://hal.science/hal-05743142v1",
  "language": "en",
  "licence": "CC-BY-NC-4.0",
  "licence_label": "CC BY-NC 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.chim"
    ],
    [
      "hal",
      "1.chim.mate"
    ],
    [
      "hal",
      "1.chim.radio"
    ],
    [
      "openalex",
      "2505|Nuclear materials and radiation effects"
    ]
  ],
  "openalex": "W7211971564",
  "pdf_url": "https://hal.science/hal-05743142/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-08",
  "publisher": "American Institute of Physics",
  "ris": "https://research.draconitic.com/paper/8618sz7nztq8q.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:31Z",
      "native_id": "hal-05743142",
      "source": "hal",
      "url": "https://hal.science/hal-05743142v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "hal:1.chim.radio",
      "subfield": "inorganic"
    },
    {
      "field": "chemistry",
      "origin": "hal:1.chim.mate",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Local ordering, defect dynamics, and phase stability in Sc–Hf oxides under ion irradiation",
  "title_text": "Local ordering, defect dynamics, and phase stability in Sc–Hf oxides under ion irradiation",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:31Z",
  "url": "https://research.draconitic.com/paper/8618sz7nztq8q",
  "venue": "Journal of Applied Physics",
  "versions": []
}