4

Pb     -0.032264996007241      0.020310356140109      0.187453438508874
Pb      1.474766946839195      1.379707772205792      0.277115278894340
Pb      1.451990547358804      0.136160820792240      1.464189832799342
Pb      0.259294174486872      1.719805276800390      1.799776546658485