Enter an atomic species: Ni Enter a cubic lattice type: fcc Enter a model name: Sim_LAMMPS_ADP_XuWangQian_2022_NiPd__SM_559286646876_000 Enter a lattice constant (m): 3.523999392986298e-10 WARNING, 1 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 1.160e-08*i) WARNING, 1 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 1.160e-08*i)