This Fe EAM potential parameter file is from the NIST repository, "Fe_2.eam.fs" as of the March 9, 2009 update. It is similar to "Fe_mm.eam.fs" in the LAMMPS distribution dated 2007-06-11, but gives different results for very small interatomic distances (The LAMMPS potential is in fact the deprecated potential referred to in the March 9, 2009 update on the NIST repository). The file header includes a note from the NIST contributor: "The potential was taken from v9_4_bcc (in C:\SIMULATION.MD\Fe\Results\ab_initio+Interstitials)"