Nb 
 1.0000000000000000
     3.3023736761276514    0.0000000000000000   -0.0000000000000000
     0.0000000000000000    3.3023736761276514    0.0000000000000000
     0.0000000000000000    0.0000000000000000    3.3023736761276514
 Nb 
   2
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  1.6511868380638259  1.6511868380638259  1.6511868380638259   T   T   T