C Si 
 1.0000000000000000
     3.0827644885058239   -0.0000000000000000    0.0000000000000000
    -1.5413822442529119    2.6697523609305849   -0.0000000000000000
     0.0000000000000000    0.0000000000000000    5.0341333294888795
 C   Si 
   2   2
Selective dynamics
Cartesian
 -0.0000000154138229  1.7798349161862310  2.5195837314046265   T   T   T
  1.5413822288390902  0.8899174625427028  0.0025170666601871   T   T   T
 -0.0000000154138229  1.7798349161862310  4.4073837299720617   T   T   T
  1.5413822288390902  0.8899174625427028  1.8903170652276211   T   T   T