Nb 
 1.0000000000000000
     3.3024269388084915   -0.0000000000000000   -0.0000000000000000
    -0.0000000000000000    3.3024269388084915   -0.0000000000000000
    -0.0000000000000000   -0.0000000000000000    3.3024269388084915
 Nb 
   2
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  1.6512134694042455  1.6512134694042455  1.6512134694042455   T   T   T