[1] The file format is used in computational chemistry programs for importing and exporting geometries.
This intentional omission allows for greater flexibility: to create an XYZ file, you don't need to know where a molecule's bonds are; you just need to know where its atoms are.
Connectivity information is generated automatically for XYZ files as they are read into XMol-related applications.
Briefly, if the distance between two atoms is less than the sum of their covalent radii, they are considered bonded.
The following is an example xyz format for m successive snapshot which can be rendered as an animation: Note that the xyz standard does not require that the number or chemical nature of atoms should be the same at subsequent snapshots, which allows for atoms disappearing from or coming into the field of view during the animation.