H fcc Sim_LAMMPS_reaxFF_FthenakisPetsalakisTozzini_2022_CHON__SM_198543900691_000 2.368977218866348 Optimization terminated successfully. Current function value: -0.855747 Iterations: 87 Function evaluations: 231 C11 = 1227.147403 +/- 0.007336 GPa C12 = 1369.099057 +/- 0.005187 GPa C44 = -155.587993 +/- 0.001834 GPa B = 1321.781839 +/- 0.004235 GPa