Enter an atomic species: Pt Enter a cubic lattice type: fcc Enter a model name: MEAM_LAMMPS_KimLee_2006_PtFe__MO_343168101490_002 Enter a lattice constant (m): 3.917371593415737e-10 WARNING, 1 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 1.910e-09*i) WARNING, 1 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 1.910e-09*i)