../../td/EquilibriumCrystalStructure__TD_457028483760_002/runner Ga N AB_hP4_186_b_b a c/a z1 z2 standard 1 3.205 1.6289236 0.00016799968 0.376832 Tersoff_LAMMPS_NordAlbeErhart_2003_GaN__MO_612061685362_004