4

Pb      0.196730383185357      0.299100330077390      0.166257449860916
Pb      1.563758080368095      1.627176771222487      0.201525292891096
Pb      1.672588420093811     -0.206658456805471      1.567368791881956
Pb      0.189806877889805      1.763757760708299      1.340906912560788