Relaxed with Orb v3; 0.03 eV/Å threshold; final energy = -58.1915 eV; energy change = -3.8872 eV; symmetry: Pmmm → Pmmm
Mn8NiBi (space group: Pmmm #47, crystal system: orthorhombic, point group: mmm)
Phase diagram of Mn8NiBi; e_above_hull: 2.449540 eV/atom; predicted_stable: False
Phonon band structure (supercell [2, 2, 2], Δ=0.01 Å); imaginary modes detected; min freq = -15.56 THz