../../td/EquilibriumCrystalStructure__TD_457028483760_002/runner Hg Se AB_hP6_154_a_b a c/a x1 x2 standard 1 4.4068 2.2402197 0.31834337 0.48778232 LJ_ElliottAkerson_2015_Universal__MO_959249795837_003