building clay structures

Steve, Thanks. Lu, here is the clayff forcefield from Dr. Greathouse.
The issue I have with Material Studio is that it does not appear to
allow me to modify the forcefield (ie - I change /add the clayff
forcefield, but MS won't recognize the added atom types.) So, I can't
/ don't use MS for minimizing structures, etc with new clayff. If you
figure how to do this on MS, let me know.

clayff[1].frc (5.23 KB)