atomic polar tensor units: C, DÅ−1

Initialism: APT
https://doi.org/10.1351/goldbook.08572
3 × 3 tensor that gives the change in the components of the molecular dipole moment when the atom is displaced in three-dimensional space.
Notes:
  1. The rows correspond to different components of the dipole moment and the columns to x, y and z displacements.
  2. APTs have been widely used in the analysis of infrared absorption intensities.
  3. SI unit: C. Common unit: DÅ−1≈3.33564E−30C.
Source:
PAC, 2021, 93, 647. (Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)) on page 739 [Terms] [Paper]
Citation: 'atomic polar tensor' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.08572 RIS BibTex EndNote
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