H Mg 
 1.0000000000000000
     2.7310074929737898    0.0000000000000000   -0.0000000000000000
     0.0000000000000000    2.7310074929737920   -0.0000000000000000
    -0.0000000000000000   -0.0000000000000000    3.3812100328258166
 H   Mg 
   4   2
Selective dynamics
Cartesian
  1.1476027315939594  1.1476027315939599 -0.0000000000000000   T   T   T
  1.5834047613798325  1.5834047613798339 -0.0000000000000000   T   T   T
  0.2179010148929369  2.5131064780808559  1.6906050164129076   T   T   T
  2.5131064780808527  0.2179010148929373  1.6906050164129074   T   T   T
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  1.3655037464868955  1.3655037464868964  1.6906050164129076   T   T   T