Nb 
 1.0000000000000000
     3.2849586753637321    0.0000000000000000    0.0000000000000000
     0.0000000000000000    3.2849586753637321   -0.0000000000000000
     0.0000000000000000   -0.0000000000000000    3.2849586753637321
 Nb 
   2
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  1.6424793376818660  1.6424793376818660  1.6424793376818660   T   T   T