Phonon band structure (supercell [2, 2, 2], Δ=0.01 Å); imaginary modes detected; min freq = -3.77 THz
Relaxed with Orb v3; 0.03 eV/Å threshold; final energy = -40.7885 eV; energy change = 0.0000 eV; symmetry: Pm-3m → Pm-3m
