Displacive transition

{
  "id": "MLC-T-CHM-003315",
  "term": "Displacive transition",
  "field": "Chemistry",
  "definition": "A type of diffusionless phase transition in a solid characterized by small, cooperative displacements of atoms from their original lattice positions. These atomic shifts result in a change in crystal symmetry but do not involve the breaking or formation of chemical bonds. The transition between the alpha and beta forms of quartz at 573 °C is a classic example of a displacive transition.",
  "subject": "Inorganic Chemistry",
  "see_also": [
    "Jahn-Teller transition",
    "ferroic transition"
  ],
  "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/displacive-transition/"
}