Si fcc MFF_MistriotisFlytzanisFarantos_1989_Si__MO_080526771943_001 4.17543204129 Optimization terminated successfully. Current function value: -18.215494 Iterations: 72 Function evaluations: 189 C11 = 1222.482384 +/- 0.007336 GPa C12 = 1197.477858 +/- 0.005187 GPa C44 = 61.432919 +/- 0.001834 GPa B = 1205.812700 +/- 0.004235 GPa