O Si 
 1.0000000000000000
     4.3042068145646697    0.0000000000000000    0.0000000000000000
     0.0000000000000000    4.3042068145646697    0.0000000000000000
     0.0000000000000000    0.0000000000000000    4.3042068145646697
 O   Si 
   8   4
Selective dynamics
Cartesian
  1.4532064586165203  1.4532064586165203  1.4532064586165203   T   T   T
  0.6988969486658155  2.8510003559481514  3.6053098658988549   T   T   T
  2.8510003559481514  3.6053098658988549  0.6988969486658153   T   T   T
  3.6053098658988549  0.6988969486658153  2.8510003559481509   T   T   T
  2.8510003559481514  2.8510003559481514  2.8510003559481509   T   T   T
  3.6053098658988549  1.4532064586165203  0.6988969486658153   T   T   T
  1.4532064586165203  0.6988969486658153  3.6053098658988549   T   T   T
  0.6988969486658155  3.6053098658988549  1.4532064586165203   T   T   T
  0.0000000000000000  0.0000000000000000  0.0000000000000000   T   T   T
  2.1521034072823357  0.0000000000000000  2.1521034072823357   T   T   T
  0.0000000000000000  2.1521034072823357  2.1521034072823357   T   T   T
  2.1521034072823357  2.1521034072823357  0.0000000000000000   T   T   T