vibrational eigenvector

symbols: $L$, $L_{ik}$, units: $\pu{kg^{-1/2}}$, $u^{-1/2}$

https://doi.org/10.1351/goldbook.08705

Part of the solution of the matrix equation of normal coordinate analysis, $\boldsymbol{G\!F\!L} = \boldsymbol{L \lambda}$. Each element $L_{ik}$ of $\boldsymbol{L}$ is a vibrational eigenvector, and gives the change in internal coordinate $R_{i}$ during unit change in the normal coordinate $Q_{k}$, as shown in matrix form by
$\boldsymbol{R} = \boldsymbol{LQ}$, i.e., $L_{ik} = \partial R_{i}/\partial Q_{k}$.

Eigenvectors are sometimes expressed in terms of symmetry coordinates or Cartesian coordinates.

Note: SI unit: $\pu{kg^{-1/2}}$. Common unit: $u^{-1/2} = \pu{2.45400E13 kg^{-1/2}}$.

Source:
PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 768 (https://doi.org/10.1515/pac-2019-0203)