Nb 
 1.0000000000000000
     4.2324304530755485   -0.0000000000000000   -0.0000000000000000
    -0.0000000000000000    4.2324304530755485   -0.0000000000000000
    -0.0000000000000000   -0.0000000000000000    4.2324304530755485
 Nb 
   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
 -0.0000000000000000  2.1162152265377743  2.1162152265377743   T   T   T
  2.1162152265377743 -0.0000000000000000  2.1162152265377743   T   T   T
  2.1162152265377743  2.1162152265377743 -0.0000000000000000   T   T   T