Nb 
 1.0000000000000000
     3.6040528086293402   -0.0000000000000000    0.0000000000000000
    -0.0000000000000000    3.6040528086293402    0.0000000000000000
    -0.0000000000000000    0.0000000000000000    3.6040528086293402
 Nb 
   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
 -0.0000000000000000  1.8020264043146710  1.8020264043146710   T   T   T
  1.8020264043146710  0.0000000000000000  1.8020264043146710   T   T   T
  1.8020264043146710  1.8020264043146710  0.0000000000000000   T   T   T