title Lead Oxide PbO2, cassiterite structure from Wycoff v.1 p.251
a  4.946         c  3.379	core	pb
rmax=6.0    Space  P 42/M N M
atom
! At.type  x        y       z      
   Pb     0.0      0.0     0.0       
   O       .3       .3     0.0