Enter an atomic species: Au Enter a cubic lattice type: fcc Enter a model name: LJ_ElliottAkerson_2015_Universal__MO_959249795837_003 Enter a lattice constant (m): 3.740705043077469e-10 Writing phonon.eq.pckl Writing phonon.0x-.pckl Writing phonon.0x+.pckl Writing phonon.0y-.pckl Writing phonon.0y+.pckl Writing phonon.0z-.pckl Writing phonon.0z+.pckl WARNING, 1 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 2.147e-08*i) WARNING, 1 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 2.147e-08*i)