4

Pb      0.165236169516201     -0.117090031109936      0.183608372117365
Pb      1.629191362354069      1.450615471184623      0.145928548495298
Sn      1.327066603736437      0.203599850767824      1.250685422840780
Sn      0.151540286486125      1.289736815429668      1.798110161213441