Ca  O Si 
 1.0000000000000000
     3.5687510310845343    0.0000000000000000   -0.0000000000000000
     0.0000000000000000    3.5687510310845343   -0.0000000000000000
     0.0000000000000000   -0.0000000000000000    3.5687510310845343
 Ca  O   Si 
   1   3   1
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  0.0000000000000000  1.7843755155422671  1.7843755155422671   T   T   T
  1.7843755155422671 -0.0000000000000000  1.7843755155422671   T   T   T
  1.7843755155422671  1.7843755155422671 -0.0000000000000000   T   T   T
  1.7843755155422671  1.7843755155422671  1.7843755155422671   T   T   T