Enter an atomic species: Rh Enter a cubic lattice type: fcc Enter a model name: Sim_LAMMPS_ADP_WangXuQian_2021_AuRh__SM_066295357485_000 Enter a lattice constant (m): 3.79999965429306e-10 WARNING, 2 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 1.797e-08*i) WARNING, 2 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 1.797e-08*i)