The compound described by Si crystallizes in the hexagonal P6/m space group. Si(1) is bonded to seven equivalent Si(1) atoms to form a mixture of edge and corner-sharing SiSi7 hexagonal pyramids. is represented by the CIF file [CIF]
data_Si
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.752
_cell_length_b   6.752
_cell_length_c   2.474
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   97.679
_cell_formula_units_Z   6
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Si  Si0  1  0.153  0.732  0.000  1.0
  Si  Si1  1  0.268  0.422  0.000  1.0
  Si  Si2  1  0.578  0.847  0.000  1.0
  Si  Si3  1  0.847  0.268  0.000  1.0
  Si  Si4  1  0.732  0.578  0.000  1.0
  Si  Si5  1  0.422  0.153  0.000  1.0
[/CIF]
.
The compound described by Si crystallizes in the hexagonal P6/m space group. Si(1) is bonded to seven equivalent Si(1) atoms to form a mixture of edge and corner-sharing SiSi7 hexagonal pyramids. is represented by the CIF file [CIF]
data_Si
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.752
_cell_length_b   6.752
_cell_length_c   2.474
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   120.000
_symmetry_Int_Tables_number   1
_cell_volume   97.679
_cell_formula_units_Z   6
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Si  Si0  1  0.153  0.732  0.000  1.0
  Si  Si1  1  0.268  0.422  0.000  1.0
  Si  Si2  1  0.578  0.847  0.000  1.0
  Si  Si3  1  0.847  0.268  0.000  1.0
  Si  Si4  1  0.732  0.578  0.000  1.0
  Si  Si5  1  0.422  0.153  0.000  1.0
[/CIF]
.