Pb bcc Morse_Shifted_GirifalcoWeizer_1959LowCutoff_Pb__MO_534638645497_004 3.947259090840816 Optimization terminated successfully. Current function value: -3.791055 Iterations: 92 Function evaluations: 249 C11 = 43.192228 +/- 0.007336 GPa C12 = 41.159406 +/- 0.005187 GPa C44 = 41.249778 +/- 0.001834 GPa B = 41.837013 +/- 0.004235 GPa