The compound described by Ce4Rh12Si crystallizes in the cubic Im-3m space group. Ce(1) is bonded to six equivalent Rh(1) and six equivalent Rh(2) atoms to form CeRh12 cuboctahedra that share corners with twelve equivalent Ce(1)Rh12 cuboctahedra, faces with six equivalent Ce(1)Rh12 cuboctahedra, and faces with two equivalent Si(1)Rh6 octahedra. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a distorted square co-planar geometry to four equivalent Ce(1) atoms. In the second Rh site, Rh(2) is bonded in a 5-coordinate geometry to four equivalent Ce(1) and one Si(1) atom. Si(1) is bonded to six equivalent Rh(2) atoms to form SiRh6 octahedra that share faces with eight equivalent Ce(1)Rh12 cuboctahedra. is represented by the CIF file [CIF]
data_Ce4SiRh12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.146
_cell_length_b   7.146
_cell_length_c   7.146
_cell_angle_alpha   109.471
_cell_angle_beta   109.471
_cell_angle_gamma   109.471
_symmetry_Int_Tables_number   1
_cell_volume   280.947
_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  0.500  1.0
  Ce  Ce1  1  0.000  0.500  0.000  1.0
  Ce  Ce2  1  0.500  0.000  0.000  1.0
  Ce  Ce3  1  0.500  0.500  0.500  1.0
  Si  Si4  1  0.000  0.000  0.000  1.0
  Rh  Rh5  1  0.750  0.250  0.500  1.0
  Rh  Rh6  1  0.750  0.500  0.250  1.0
  Rh  Rh7  1  0.500  0.250  0.750  1.0
  Rh  Rh8  1  0.250  0.500  0.750  1.0
  Rh  Rh9  1  0.250  0.750  0.500  1.0
  Rh  Rh10  1  0.500  0.750  0.250  1.0
  Rh  Rh11  1  0.720  0.720  1.000  1.0
  Rh  Rh12  1  0.280  0.000  0.280  1.0
  Rh  Rh13  1  0.000  0.280  0.280  1.0
  Rh  Rh14  1  0.280  0.280  0.000  1.0
  Rh  Rh15  1  0.720  1.000  0.720  1.0
  Rh  Rh16  1  1.000  0.720  0.720  1.0
[/CIF]
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The compound described by Ce4Rh12Si crystallizes in the cubic Im-3m space group. Ce(1) is bonded to six equivalent Rh(1) and six equivalent Rh(2) atoms to form CeRh12 cuboctahedra that share corners with twelve equivalent Ce(1)Rh12 cuboctahedra, faces with six equivalent Ce(1)Rh12 cuboctahedra, and faces with two equivalent Si(1)Rh6 octahedra. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a distorted square co-planar geometry to four equivalent Ce(1) atoms. In the second Rh site, Rh(2) is bonded in a 5-coordinate geometry to four equivalent Ce(1) and one Si(1) atom. Si(1) is bonded to six equivalent Rh(2) atoms to form SiRh6 octahedra that share faces with eight equivalent Ce(1)Rh12 cuboctahedra. is represented by the CIF file [CIF]
data_Ce4SiRh12
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.146
_cell_length_b   7.146
_cell_length_c   7.146
_cell_angle_alpha   109.471
_cell_angle_beta   109.471
_cell_angle_gamma   109.471
_symmetry_Int_Tables_number   1
_cell_volume   280.947
_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  0.500  1.0
  Ce  Ce1  1  0.000  0.500  0.000  1.0
  Ce  Ce2  1  0.500  0.000  0.000  1.0
  Ce  Ce3  1  0.500  0.500  0.500  1.0
  Si  Si4  1  0.000  0.000  0.000  1.0
  Rh  Rh5  1  0.750  0.250  0.500  1.0
  Rh  Rh6  1  0.750  0.500  0.250  1.0
  Rh  Rh7  1  0.500  0.250  0.750  1.0
  Rh  Rh8  1  0.250  0.500  0.750  1.0
  Rh  Rh9  1  0.250  0.750  0.500  1.0
  Rh  Rh10  1  0.500  0.750  0.250  1.0
  Rh  Rh11  1  0.720  0.720  1.000  1.0
  Rh  Rh12  1  0.280  0.000  0.280  1.0
  Rh  Rh13  1  0.000  0.280  0.280  1.0
  Rh  Rh14  1  0.280  0.280  0.000  1.0
  Rh  Rh15  1  0.720  1.000  0.720  1.0
  Rh  Rh16  1  1.000  0.720  0.720  1.0
[/CIF]
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