Si 
 1.0000000000000000
     3.6616544252436278   -0.0000000000000000   -0.0000000000000000
    -0.0000000000000000    3.6616544252436278    0.0000000000000000
    -0.0000000000000000    0.0000000000000000    3.6616544252436283
 Si 
   4
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
 -0.0000000000000000  1.8308272126218137  1.8308272126218144   T   T   T
  1.8308272126218137  0.0000000000000000  1.8308272126218144   T   T   T
  1.8308272126218137  1.8308272126218137  0.0000000000000000   T   T   T