The crystal structure described by FeSi crystallizes in the cubic P2_13 space group. Fe(1) is bonded in a 7-coordinate geometry to seven equivalent Si(1) atoms. Si(1) is bonded in a 7-coordinate geometry to seven equivalent Fe(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_FeSi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.402
_cell_length_b   4.402
_cell_length_c   4.402
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   85.312
_cell_formula_units_Z   4
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
  Fe  Fe0  1  0.863  0.637  0.363  1.0
  Fe  Fe1  1  0.637  0.363  0.863  1.0
  Fe  Fe2  1  0.363  0.863  0.637  1.0
  Fe  Fe3  1  0.137  0.137  0.137  1.0
  Si  Si4  1  0.159  0.341  0.659  1.0
  Si  Si5  1  0.341  0.659  0.159  1.0
  Si  Si6  1  0.659  0.159  0.341  1.0
  Si  Si7  1  0.841  0.841  0.841  1.0
[/CIF]
.
The crystal structure described by FeSi crystallizes in the cubic P2_13 space group. Fe(1) is bonded in a 7-coordinate geometry to seven equivalent Si(1) atoms. Si(1) is bonded in a 7-coordinate geometry to seven equivalent Fe(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_FeSi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.402
_cell_length_b   4.402
_cell_length_c   4.402
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   85.312
_cell_formula_units_Z   4
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
  Fe  Fe0  1  0.863  0.637  0.363  1.0
  Fe  Fe1  1  0.637  0.363  0.863  1.0
  Fe  Fe2  1  0.363  0.863  0.637  1.0
  Fe  Fe3  1  0.137  0.137  0.137  1.0
  Si  Si4  1  0.159  0.341  0.659  1.0
  Si  Si5  1  0.341  0.659  0.159  1.0
  Si  Si6  1  0.659  0.159  0.341  1.0
  Si  Si7  1  0.841  0.841  0.841  1.0
[/CIF]
.