I Rb 
 1.0000000000000000
     4.0855130686769892   -0.0000000000000000   -0.0000000000000000
    -0.0000000000000000    4.0855130686769892    0.0000000000000000
     0.0000000000000000    0.0000000000000000    4.0855130686769892
 I   Rb 
   1   1
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  2.0427565343384946  2.0427565343384946  2.0427565343384946   T   T   T