Ar bcc Morse_Shifted_Jelinek_1972_Ar__MO_831902330215_003 4.188581958413124 Optimization terminated successfully. Current function value: -0.178777 Iterations: 74 Function evaluations: 191 C11 = 2.659917 +/- 0.007336 GPa C12 = 3.074781 +/- 0.005187 GPa C44 = 3.078076 +/- 0.001834 GPa B = 2.936493 +/- 0.004235 GPa