Valence transition

{
  "id": "MLC-T-CHM-012502",
  "term": "Valence transition",
  "field": "Chemistry",
  "definition": "A phase transition in a solid material characterized by a change in the average valence state of one of its constituent elements. This alteration in electronic configuration affects the material's physical and chemical properties. Such transitions are observed in certain rare-earth compounds and transition metal oxides.",
  "subject": "Inorganic Chemistry",
  "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/valence-transition/"
}