Verwey transition

{
  "id": "MLC-T-CHM-012555",
  "term": "Verwey transition",
  "field": "Chemistry",
  "definition": "A first-order phase transition observed in magnetite (Fe3O4) at approximately 120 K, characterized by a sharp change in electrical conductivity and magnetic properties. This transition involves an ordering of Fe2+ and Fe3+ ions on the octahedral sites of the inverse spinel structure, accompanied by a structural distortion. Below the transition temperature, magnetite becomes an insulator.",
  "subject": "Inorganic Chemistry",
  "see_also": [
    "valence"
  ],
  "references": [
    "PAC, 1994, 66, 577. 'Definitions of terms relating to phase transitions of the solid state (IUPAC Recommendations 1994)' on page 593 (https://doi.org/10.1351/pac199466030577)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/verwey-transition/"
}