Rb bcc Morse_Shifted_GirifalcoWeizer_1959LowCutoff_Rb__MO_754498969542_002 5.79138576984 Optimization terminated successfully. Current function value: -1.563389 Iterations: 69 Function evaluations: 177 C11 = 2.561518 +/- 0.007336 GPa C12 = 1.807078 +/- 0.005187 GPa C44 = 1.825506 +/- 0.001834 GPa B = 2.058558 +/- 0.004235 GPa