Phonon band structure (supercell [2, 2, 2], Δ=0.01 Å); imaginary modes detected; min freq = -6.20 THz
Relaxed with Orb v3; 0.03 eV/Å threshold; final energy = -64.0170 eV; energy change = -0.3202 eV; symmetry: P4/mmm → P4/mmm