Enter an atomic species: Au Enter a cubic lattice type: fcc Enter a model name: Morse_EIP_GuthikondaElliott_2011_AuCd__MO_703849496106_002 Enter a lattice constant (m): 4.050522321462632e-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, 3 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 8.576e-09*i) WARNING, 3 imaginary frequencies at q = ( 0.00, 0.00, 0.00) ; (omega_q = 8.576e-09*i)