{
  "id": "cond-mat/0002224",
  "version": "v1",
  "published": "2000-02-15T11:50:41.000Z",
  "updated": "2000-02-15T11:50:41.000Z",
  "title": "Ice XII in its second regime of metastability",
  "authors": [
    "Michael Marek Koza",
    "Helmut Schober",
    "Thomas Hansen",
    "Albert Toelle",
    "Franz Fujara"
  ],
  "comment": "3 Pages of RevTeX, 3 tables, 3 figures (submitted to Physical Review Letters)",
  "categories": [
    "cond-mat.stat-mech"
  ],
  "abstract": "We present neutron powder diffraction results which give unambiguous evidence for the formation of the recently identified new crystalline ice phase[Lobban et al.,Nature, 391, 268, (1998)], labeled ice XII, at completely different conditions. Ice XII is produced here by compressing hexagonal ice I_h at T = 77, 100, 140 and 160 K up to 1.8 GPa. It can be maintained at ambient pressure in the temperature range 1.5 < T < 135 K. High resolution diffraction is carried out at T = 1.5 K and ambient pressure on ice XII and accurate structural properties are obtained from Rietveld refinement. At T = 140 and 160 K additionally ice III/IX is formed. The increasing amount of ice III/IX with increasing temperature gives an upper limit of T ~ 150 K for the successful formation of ice XII with the presented procedure.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2000-02-15T11:50:41.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "second regime",
      "metastability",
      "ambient pressure",
      "neutron powder diffraction results",
      "ice iii/ix"
    ],
    "note": {
      "typesetting": "RevTeX",
      "pages": 3,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}