Si diamond LJ_ElliottAkerson_2015_Universal__MO_959249795837_003 4.936726920306683 Optimization terminated successfully. Current function value: -78.903154 Iterations: 77 Function evaluations: 198 C11 = -11750145.431949 +/- 0.007336 GPa C12 = 609.899624 +/- 0.005187 GPa C44 = -4406278.500776 +/- 0.001834 GPa B = -3916308.544234 +/- 0.004235 GPa