Ar fcc Morse_SigmoidalSmoothed_Jelinek_1972_Ar__MO_071460865933_002 5.262299403548241 Optimization terminated successfully. Current function value: -0.000227 Iterations: 71 Function evaluations: 188 C11 = 0.002338 +/- 0.007336 GPa C12 = 0.001384 +/- 0.005187 GPa C44 = 0.001387 +/- 0.001834 GPa B = 0.001702 +/- 0.004235 GPa