Pair correlation length

{
  "id": "MLC-T-CHM-008420",
  "term": "Pair correlation length",
  "field": "Chemistry",
  "definition": "A measure of the average distance over which the positions or orientations of particles in a system are correlated. It quantifies the extent of spatial ordering or disorder in a material, such as a liquid or a polymer melt. This length scale becomes infinite at a critical point, indicating long-range order.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "characteristic length",
    "interfacial layer",
    "intermolecular",
    "macromolecule",
    "number density"
  ],
  "references": [
    "PAC, 1994, 66, 1667. 'Thin films including layers: terminology in relation to their preparation and characterization (IUPAC Recommendations 1994)' on page 1674 (https://doi.org/10.1351/pac199466081667)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/pair-correlation-length/"
}