|Cluster description: atomic layer|
layer symbol x y z a b α1 α2
adds to the cluster the atoms of a layer perpendicular to the z axis. The keyword symbol can be any of the atomic-element symbols (H, He, ... up to Am). (Warning: this is case sensitive.) This refers to the type of atoms that are added by this command.
The parameters x y z a b α1 α2 are defined in the following figure (distances are in Angstroms and angles in degrees):