4

Pb      0.209471240111462     -0.144871493764886      0.052807135443839
Pb      1.413338831542036      1.346554906332897     -0.127587647313378
Pb      1.322308438900281     -0.029622998773809      1.222864201591614
Pb     -0.061419271853544      0.954511654623977      1.654887825454511