Site splitting

{
  "id": "MLC-T-CHM-010917",
  "term": "Site splitting",
  "field": "Chemistry",
  "definition": "A splitting of a spectral band into two or more components in a crystal, where the same transition of the free gas-phase molecule gives a single band. It is attributed either to the molecule sitting at a lattice position with lower symmetry than the free molecule has, which lifts a degeneracy, or to the presence of several inequivalent kinds of lattice site in the crystal. The related effect arising from coupling between molecules within the unit cell is called factor group splitting.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "spectrum"
  ],
  "references": [
    "PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 763 (https://doi.org/10.1515/pac-2019-0203)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/site-splitting/"
}