Retrieving "Rigid Body Translations" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Molecular Coordinates

   Linked via "rigid-body translations"

   In the Cartesian representation, the position of each nucleus $i$ in a molecule containing $N$ atoms is specified by three orthogonal components $(xi, yi, z_i)$ relative to a fixed, arbitrarily chosen laboratory frame of reference. For a system of $N$ atoms, this results in $3N$ total Cartesian coordinates.
   The relationship between the Cartesian representation and the [internal coordinate representation…