The material described by CeSi5 crystallizes in the orthorhombic Immm space group. Ce(1) is bonded in a 14-coordinate geometry to two equivalent Si(2) and twelve equivalent Si(1) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 8-coordinate geometry to three equivalent Ce(1), two equivalent Si(2), and three equivalent Si(1) atoms. In the second Si site, Si(2) is bonded in a distorted q6 geometry to two equivalent Ce(1) and eight equivalent Si(1) atoms. is represented by the CIF file [CIF]
data_CeSi5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.849
_cell_length_b   5.849
_cell_length_c   5.849
_cell_angle_alpha   142.371
_cell_angle_beta   117.757
_cell_angle_gamma   75.066
_symmetry_Int_Tables_number   1
_cell_volume   105.819
_cell_formula_units_Z   1
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
  Ce  Ce0  1  0.000  0.000  0.000  1.0
  Si  Si1  1  0.473  0.671  0.802  1.0
  Si  Si2  1  0.527  0.329  0.198  1.0
  Si  Si3  1  0.131  0.329  0.802  1.0
  Si  Si4  1  0.869  0.671  0.198  1.0
  Si  Si5  1  0.500  0.000  0.500  1.0
[/CIF]
.
The material described by CeSi5 crystallizes in the orthorhombic Immm space group. Ce(1) is bonded in a 14-coordinate geometry to two equivalent Si(2) and twelve equivalent Si(1) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 8-coordinate geometry to three equivalent Ce(1), two equivalent Si(2), and three equivalent Si(1) atoms. In the second Si site, Si(2) is bonded in a distorted q6 geometry to two equivalent Ce(1) and eight equivalent Si(1) atoms. is represented by the CIF file [CIF]
data_CeSi5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.849
_cell_length_b   5.849
_cell_length_c   5.849
_cell_angle_alpha   142.371
_cell_angle_beta   117.757
_cell_angle_gamma   75.066
_symmetry_Int_Tables_number   1
_cell_volume   105.819
_cell_formula_units_Z   1
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
  Ce  Ce0  1  0.000  0.000  0.000  1.0
  Si  Si1  1  0.473  0.671  0.802  1.0
  Si  Si2  1  0.527  0.329  0.198  1.0
  Si  Si3  1  0.131  0.329  0.802  1.0
  Si  Si4  1  0.869  0.671  0.198  1.0
  Si  Si5  1  0.500  0.000  0.500  1.0
[/CIF]
.