Nb 
 1.0000000000000000
     4.1681775777500167   -0.0000000000000000    0.0000000000000000
    -0.0000000000000000    4.1681775777500167    0.0000000000000000
     0.0000000000000000    0.0000000000000000    4.1681775777500167
 Nb 
   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
 -0.0000000000000000  2.0840887888750084  2.0840887888750084   T   T   T
  2.0840887888750084  0.0000000000000000  2.0840887888750084   T   T   T
  2.0840887888750084  2.0840887888750084  0.0000000000000000   T   T   T