Is there a max limit to the number of 'atom types' that can be assigned?

Hi Guys,

Is there a maximum limit to the number of ‘atom types’ that can be assigned?
(I found that the max no. of groups is 32 but cant find anything on the max number of atom types?

Thanks in advance

Daniel

Hi Guys,

Is there a maximum limit to the number of 'atom types' that can be assigned?
(I found that the max no. of groups is 32 but cant find anything on the max
number of atom types?

the limit is around two billion atom types. however, you will never
get this far because you will run out of memory first. there are
plenty of arrays that are of dimension O(N**2) per atom type.
this also means, that having a lot of atom types will make LAMMPS run slower.

axel.