Gd bcc LJ_ElliottAkerson_2015_Universal__MO_959249795837_003 4.3146871626377115 Optimization terminated successfully. Current function value: -33.424732 Iterations: 89 Function evaluations: 241 C11 = 472.931287 +/- 0.007336 GPa C12 = 577.425435 +/- 0.005187 GPa C44 = 578.062135 +/- 0.001834 GPa B = 542.594052 +/- 0.004235 GPa