Mg Si 
 1.0000000000000000
     4.9143309661858092    0.0000000000000000   -0.0000000000000000
    -2.4571654830929046    4.2559354593214360    0.0000000000000000
    -0.0000000000000000   -0.0000000000000000    5.8945691050120343
 Mg  Si 
   4   2
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
 -0.0000000000000000 -0.0000000000000000  2.9472845525060167   T   T   T
 -0.0000000000000005  2.8372903062142916  1.4736422762530084   T   T   T
  2.4571654830929055  1.4186451531071460  4.4209268287590255   T   T   T
 -0.0000000000000005  2.8372903062142916  4.4209268287590255   T   T   T
  2.4571654830929055  1.4186451531071460  1.4736422762530084   T   T   T