Doubt regarding 'region sphere' command in LAMMPS

Hello LAMMPS users,

I am using the LAMMPS version 23Dec2022. I have a doubt regarding the ‘region sphere’ command. Does the ‘region sphere’ command take atoms as points while gathering the atoms within the specified radius? Or does it also consider the van der Waal’s radius of the atoms too? The reason why I am asking this is that in my simulation, when I am using this command, it is taking some atoms beyond the specified spherical radius.


Please attach the input script which shows the issue.

All regions treat atoms as point particles.

That is impossible. There must be a flaw in how you come to this conclusion.