Nb 
 1.0000000000000000
     3.3024435345625793   -0.0000000000000000    0.0000000000000000
    -0.0000000000000000    3.3024435345625793    0.0000000000000000
    -0.0000000000000000    0.0000000000000000    3.3024435345625793
 Nb 
   2
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  1.6512217672812897  1.6512217672812897  1.6512217672812897   T   T   T