Nb 
 1.0000000000000000
     3.3078989331480555    0.0000000000000000   -0.0000000000000000
     0.0000000000000000    3.3078989331480555    0.0000000000000000
    -0.0000000000000000    0.0000000000000000    3.3078989331480555
 Nb 
   2
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  1.6539494665740277  1.6539494665740277  1.6539494665740277   T   T   T