Na sc Morse_Shifted_GirifalcoWeizer_1959LowCutoff_Na__MO_707981543254_004 3.595592379570008 Optimization terminated successfully. Current function value: -0.888900 Iterations: 68 Function evaluations: 180 C11 = 19.774860 +/- 0.007336 GPa C12 = -1.965470 +/- 0.005187 GPa C44 = -1.965400 +/- 0.001834 GPa B = 5.281307 +/- 0.004235 GPa