Nb bcc Sim_LAMMPS_ADP_SmirnovaStarikov_2017_ZrNb__SM_937902197407_000 3.2849586904 Optimization terminated successfully. Current function value: -14.993414 Iterations: 69 Function evaluations: 180 C11 = 249.099494 +/- 0.007336 GPa C12 = 116.616546 +/- 0.005187 GPa C44 = 51.365941 +/- 0.001834 GPa B = 160.777529 +/- 0.004235 GPa