4 Lattice="3.0 0.0 0.0 0.0 3.0 0.0 0.0 0.0 3.0" Properties=species:S:1:pos:R:3:forces:R:3 energy=-6.76696477333 stress="-4.9774937786170845 -0.4383381947294621 2.7206566244446204 -0.4383381947294621 -5.2248434633052465 -1.5948058115163428 2.7206566244446204 -1.5948058115163428 2.236814099473137" pbc="F F F" O -0.00183978 0.01283276 0.20071341 -4.48552766 -9.11461766 5.10721856 O 1.32858036 1.64720807 0.08942344 8.53431536 6.53514806 3.95866285 Si 1.45706424 0.27559981 1.21321713 7.03055443 -6.10682986 -11.10300641 Si 0.21736445 1.28604778 1.70384132 -11.07934214 8.68629945 2.03712501