title  MnO2, cassiterite structure from Wycoff v.1 p.251
a  4.396         c  2.871	core	mn
rmax=6.0    Space  P 42/M N M
atom
! At.type  x        y       z      
   Mn     0.0      0.0     0.0     
   O       .3       .3     0.0