4

Pb      0.273830664784013      0.132502561330504      0.100311516002597
Mg      1.483088997025454      1.354318699447148     -0.219882885551345
Pb      1.635280018970189      0.057915308048534      1.233874956727468
Mg      0.128158926911466      1.566033883699816      1.455255389631302