4

Si     -0.171419635241910      0.147208074828052      0.089423439016807
Si      1.457064244271890      1.775599808387315     -0.286782870693997
C       1.717364446883575     -0.213952216663259      1.703841316488826
C       0.047758700256887      1.232149640017638      1.500410250252311