5
 
Si    0.0000000    0.0000000    0.0000000 
H     0.8549203   -0.8549203    0.8549203 
H    -0.8549203    0.8549203    0.8549203 
H    -0.8549203   -0.8549203   -0.8549203 
H     0.8549203    0.8549203   -0.8549203 
