Enter an atomic species: Ne Enter a cubic lattice type: fcc Enter a model name: Morse_Shifted_Glyde_1970_Ne__MO_169434419764_004 Enter a lattice constant (m): 4.299560785293579e-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, 2 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 2.111e-09*i) WARNING, 2 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 2.111e-09*i)