4

Pb      0.156484075002448      0.209056948675246     -0.153618537755854
Pb      1.508258899792278      1.741479141773725     -0.277138679227623
Pb      1.694908390712763      0.172030996482186      1.740997546770916
Pb      0.210893969268727      1.264883506401703      1.531684673058240