Atomic polar tensor

{
  "id": "MLC-T-CHM-000902",
  "term": "Atomic polar tensor",
  "field": "Chemistry",
  "definition": "A 3 by 3 tensor, one per atom, whose elements are the derivatives of the molecular dipole moment components with respect to Cartesian displacement of that atom. Each row corresponds to a dipole component and each column to a displacement along x, y or z. Atomic polar tensors are used in analysing infrared absorption intensities, and their SI unit is the coulomb.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "infrared spectroscopy"
  ],
  "references": [
    "PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 739 (https://doi.org/10.1515/pac-2019-0203)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/atomic-polar-tensor/"
}