Nb 
 1.0000000000000000
     4.1884277733069331    0.0000000000000000    0.0000000000000000
     0.0000000000000000    4.1884277733069331    0.0000000000000000
     0.0000000000000000    0.0000000000000000    4.1884277733069331
 Nb 
   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  0.0000000000000000  2.0942138866534665  2.0942138866534665   T   T   T
  2.0942138866534665  0.0000000000000000  2.0942138866534665   T   T   T
  2.0942138866534665  2.0942138866534665  0.0000000000000000   T   T   T