I Rb 
 1.0000000000000000
     4.3383793813214364    0.0000000000000000    0.0000000000000000
     0.0000000000000000    4.3383793813214364    0.0000000000000000
    -0.0000000000000000    0.0000000000000000    4.3383793813214364
 I   Rb 
   1   1
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  2.1691896906607182  2.1691896906607182  2.1691896906607182   T   T   T