Dilational transition

{
  "id": "MLC-T-CHM-003210",
  "term": "Dilational transition",
  "field": "Chemistry",
  "definition": "A phase transition in which a crystal expands or contracts along one or more crystallographic axes while keeping its symmetry about those axes. The change in dimensions leaves the symmetry intact. Examples are the change from a CsCl-type to a rock-salt structure and the metal-to-semiconductor transition in quenched nickel sulfide, which expands the volume.",
  "synonyms": [
    "dilatational transition"
  ],
  "subject": "Inorganic Chemistry",
  "see_also": [
    "salt"
  ],
  "references": [
    "PAC, 1994, 66, 577. 'Definitions of terms relating to phase transitions of the solid state (IUPAC Recommendations 1994)' on page 581 (https://doi.org/10.1351/pac199466030577)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/dilational-transition/"
}