Phonon band structure (supercell [2, 2, 2], Δ=0.01 Å); imaginary modes detected; min freq = -3.54 THz
Relaxed with Orb v3; 0.03 eV/Å threshold; final energy = -63.0072 eV; energy change = -0.0034 eV; symmetry: P4/mcc → P4/mcc
