Nb 
 1.0000000000000000
     4.1496723670721156   -0.0000000000000000   -0.0000000000000000
    -0.0000000000000000    4.1496723670721156   -0.0000000000000000
     0.0000000000000000   -0.0000000000000000    4.1496723670721156
 Nb 
   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
 -0.0000000000000000  2.0748361835360578  2.0748361835360578   T   T   T
  2.0748361835360578 -0.0000000000000000  2.0748361835360578   T   T   T
  2.0748361835360578  2.0748361835360578 -0.0000000000000000   T   T   T