../../td/EquilibriumCrystalStructure__TD_457028483760_001/runner Si A_hR8_148_cf a c/a x1 x2 y2 z2 standard 1 9.4412577 0.59921929 0.28578699 0.47802387 0.97998916 0.28193827 ThreeBodyCluster_BH_BiswasHamann_1987_Si__MO_019616213550_000