4

Pb      0.260080696748254      0.079415049972161      0.173263815777658
Pb      1.321105227551443      1.331002361053225     -0.151468339549659
Pb      1.745696928592450      0.121201405867492      1.218053540781105
Pb      0.263510438299901      1.685097334142417      1.274810625660065