Mg Si 
 1.0000000000000000
     4.9143309661858314    0.0000000000000000   -0.0000000000000000
    -2.4571654830929157    4.2559354593214582   -0.0000000000000000
    -0.0000000000000000    0.0000000000000000    5.8945691050119988
 Mg  Si 
   4   2
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
 -0.0000000000000000  0.0000000000000000  2.9472845525059994   T   T   T
 -0.0000000000000011  2.8372903062143067  1.4736422762529997   T   T   T
  2.4571654830929157  1.4186451531071536  4.4209268287589971   T   T   T
 -0.0000000000000011  2.8372903062143067  4.4209268287589971   T   T   T
  2.4571654830929157  1.4186451531071536  1.4736422762529997   T   T   T