Fe12Co4N2 (requested space group: Pc #7, optimized: 144 steps, cell relaxed (isotropic))
Phonon band structure (supercell [2, 2, 2], Δ=0.01 Å); imaginary modes detected; min freq = -1.10 THz
Phase diagram of Fe6Co2N; e_above_hull: 0.305362 eV/atom; predicted_stable: False