Nb 
 1.0000000000000000
     2.8636464704795439    0.0000000000000000   -0.0000000000000000
     0.0000000000000000    2.8636464704795435    0.0000000000000000
     0.0000000000000000    0.0000000000000000    2.8636464704795439
 Nb 
   2
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  1.4318232352397717  1.4318232352397715  1.4318232352397717   T   T   T