Ca  O Si 
 1.0000000000000000
     3.4281780925630776   -0.0000000000000000   -0.0000000000000000
    -0.0000000000000000    3.4281780925630776   -0.0000000000000000
     0.0000000000000000   -0.0000000000000000    3.4281780925630776
 Ca  O   Si 
   1   3   1
Selective dynamics
Cartesian
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  0.0000000000000000  1.7140890462815386  1.7140890462815386   T   T   T
  1.7140890462815386 -0.0000000000000000  1.7140890462815386   T   T   T
  1.7140890462815386  1.7140890462815386 -0.0000000000000000   T   T   T
  1.7140890462815386  1.7140890462815386  1.7140890462815386   T   T   T