{
  "abstract": "The sound velocity, melting curve and phase diagram of ammonia have been investigated from 15 to 55 GPa and up to 3300 K using Brillouin spectroscopy of CO2 laser-heated ammonia samples in a diamond anvil cell. The melting transition was unambiguously identied from the appearance of the Brillouin peaks of uid ammonia upon temperature increase, the latter being well resolved from that of the solid phase. Our melting temperatures are in good agreement with previous measurements and theoretical predictions. Within experimental uncertainties, we do not observe any discontinuous variation of the sound velocity nor of the slope of the melting curve at the passage from the plastic phase III to the superionic phase α-SI, which is consistent with most previous experimental and theoretical results. We also nd no evidence for the superionic γ-SI phase with uid-like elastic behavior reported in a recent work, and suggest that it was mistaken with the liquid phase.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 8,
  "authors": [
    {
      "name": "Bastien Guigue"
    },
    {
      "name": "Keevin Béneut"
    },
    {
      "name": "Sandra Ninet"
    },
    {
      "name": "Marc Morand"
    },
    {
      "name": "Yiuri Garino"
    },
    {
      "name": "Gilles Minier"
    },
    {
      "name": "Philippe Rosier"
    },
    {
      "name": "Frédéric Datchi"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/fjtaerpmrb43d.bib",
  "cited_by": 0,
  "doi": "10.1103/d6tt-2j8m",
  "fulltext_url": null,
  "id": "fjtaerpmrb43d",
  "issns": [
    "2469-9950",
    "2469-9969"
  ],
  "landing_url": "https://hal.science/hal-05732806v1",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.phys"
    ],
    [
      "openalex",
      "1908|High-pressure geophysics and materials"
    ]
  ],
  "openalex": "W7160930091",
  "pdf_url": "https://hal.science/hal-05732806/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-05-22",
  "publisher": "American Physical Society",
  "ris": "https://research.draconitic.com/paper/fjtaerpmrb43d.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:21Z",
      "native_id": "hal-05732806",
      "source": "hal",
      "url": "https://hal.science/hal-05732806v1"
    }
  ],
  "subjects": [
    {
      "field": "earth",
      "origin": "openalex:1908|High-pressure geophysics and materials",
      "subfield": "geophysics"
    }
  ],
  "title": "Sound velocity, melting curve, and phase diagram of dense hot ammonia",
  "title_text": "Sound velocity, melting curve, and phase diagram of dense hot ammonia",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:21Z",
  "url": "https://research.draconitic.com/paper/fjtaerpmrb43d",
  "venue": "Physical Review B",
  "versions": []
}