{
  "abstract": "Lanthanum fluorogermanate glass samples were prepared by melt-quenching in ternary compositions 55GeO2–15M2O–30LaF3, M being K or Na and doped with 0.25 mol% of Eu2O3. Thermal analysis by differential scanning calorimetry (DSC) technique allowed us to determine both glass transition and crystallization temperatures in bulk and powder samples. Heat treatments (HTs) were performed on the basis of DSC curves with increasing HT time and temperature, and glass–ceramics were obtained in both systems. In the potassium-based glass composition, cubic KLaF4 is precipitated for lower HT temperatures. However, for the sodium-based glass, hexagonal NaLaF4 is first precipitated at lower temperatures, whereas hexagonal fluorecite LaF3 is also crystallized at higher temperatures. Eu3+ spectroscopy identified strong emission dependency with the crystallization state and nature of crystalline phases. Emission bands related to electronic transitions from the 5D2 and 5D1, usually not observed in oxide and even oxyfluoride glasses, were clearly identified and with relative strong intensity together with the well-known Eu3+ red emissions, pointing out unusual effective Eu3+ blue and green emission in these glass–ceramics. Experimental lifetimes were useful to identify different Eu3+ sites related with oxide/fluoride as well as glassy/crystalline environments.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 8,
  "authors": [
    {
      "name": "Raphael Rodrigues Faleiros"
    },
    {
      "name": "Ana Flávia Teófilo da Silva"
    },
    {
      "name": "Yago Langer Campos de Lima"
    },
    {
      "name": "Fabia Castro Cassanjes"
    },
    {
      "name": "Marc Dussauze"
    },
    {
      "name": "Thierry Cardinal"
    },
    {
      "name": "Lauro June Queiroz Maia"
    },
    {
      "name": "Gael Poirier"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5x52svqxyjpfv.bib",
  "cited_by": 0,
  "doi": "10.1111/jace.71392",
  "fulltext_url": null,
  "id": "5x52svqxyjpfv",
  "issns": [
    "0002-7820",
    "1551-2916"
  ],
  "landing_url": "https://hal.science/hal-05855293v1",
  "language": "en",
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.chim"
    ],
    [
      "openalex",
      "2503|Glass properties and applications"
    ]
  ],
  "openalex": "W7140176680",
  "pdf_url": "https://hal.science/hal-05855293/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-06",
  "publisher": "Wiley",
  "ris": "https://research.draconitic.com/paper/5x52svqxyjpfv.ris",
  "sources": [
    {
      "first_seen": "2026-11-07T12:20:26Z",
      "native_id": "hal-05855293",
      "source": "hal",
      "url": "https://hal.science/hal-05855293v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2503|Glass properties and applications",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Unusual Eu3+ luminescent properties in alkaline lanthanum fluorogermanate glasses and glassceramics",
  "title_text": "Unusual Eu3+ luminescent properties in alkaline lanthanum fluorogermanate glasses and glassceramics",
  "type": "peer-reviewed",
  "updated_at": "2026-11-08T12:20:49Z",
  "url": "https://research.draconitic.com/paper/5x52svqxyjpfv",
  "venue": "Journal of the American Ceramic Society",
  "versions": []
}