[lammps-users] Setting up geometry

I'm trying to create a screw dislocation type geometry, but I am having some trouble building up my atoms. I want to create a sc lattice, orthogonal, next to a parallelopiped, with one plane of the atoms being tilted. I was using 2 region commands (a block and a prism), but I'm unsure how to create a simulation box that encloses both of the regions, since create_box seems to only allow one region. Any suggestions?

Erin

Create a 3rd region that is the union of the first two, or
defined explicitly, and use that one with create_box.

To populate the two regions with atoms, you can
use the lattice comand twice, each time followed by
a create_atoms command.

Steve