The material structure described by CePt5Sb crystallizes in the monoclinic C2/m space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded to two equivalent Pt(2), four equivalent Pt(1), and six equivalent Pt(3) atoms to form distorted CePt12 cuboctahedra that share edges with six equivalent Ce(1)Pt12 cuboctahedra, edges with eight equivalent Pt(1)Ce3Sb2Pt7 cuboctahedra, edges with six equivalent Ce(2)Sb2Pt18 hexagonal bipyramids, and faces with four equivalent Pt(1)Ce3Sb2Pt7 cuboctahedra. In the second Ce site, Ce(2) is bonded to four equivalent Pt(2), six equivalent Pt(4), eight equivalent Pt(1), and two equivalent Sb(1) atoms to form distorted CeSb2Pt18 hexagonal bipyramids that share edges with six equivalent Ce(1)Pt12 cuboctahedra, faces with sixteen equivalent Pt(1)Ce3Sb2Pt7 cuboctahedra, and faces with six equivalent Ce(2)Sb2Pt18 hexagonal bipyramids. There are four inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to one Ce(1), two equivalent Ce(2), one Pt(3), two equivalent Pt(1), two equivalent Pt(2), two equivalent Pt(4), and two equivalent Sb(1) atoms to form distorted PtCe3Sb2Pt7 cuboctahedra that share corners with ten equivalent Pt(1)Ce3Sb2Pt7 cuboctahedra, edges with two equivalent Ce(1)Pt12 cuboctahedra, edges with four equivalent Pt(1)Ce3Sb2Pt7 cuboctahedra,  a faceface with one Ce(1)Pt12 cuboctahedra, faces with five equivalent Pt(1)Ce3Sb2Pt7 cuboctahedra, and faces with four equivalent Ce(2)Sb2Pt18 hexagonal bipyramids. In the second Pt site, Pt(2) is bonded in a 12-coordinate geometry to one Ce(1), two equivalent Ce(2), one Pt(3), two equivalent Pt(4), four equivalent Pt(1), and two equivalent Sb(1) atoms. In the third Pt site, Pt(3) is bonded in a 4-coordinate geometry to three equivalent Ce(1), one Pt(2), two equivalent Pt(1), and one Sb(1) atom. In the fourth Pt site, Pt(4) is bonded in a 3-coordinate geometry to three equivalent Ce(2), two equivalent Pt(2), and four equivalent Pt(1) atoms. Sb(1) is bonded in a 8-coordinate geometry to one Ce(2), one Pt(3), two equivalent Pt(2), and four equivalent Pt(1) atoms. is represented by the CIF card [CIF]
data_CeSbPt5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.388
_cell_length_b   5.388
_cell_length_c   10.933
_cell_angle_alpha   75.595
_cell_angle_beta   75.595
_cell_angle_gamma   60.255
_symmetry_Int_Tables_number   1
_cell_volume   263.956
_cell_formula_units_Z   2
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  0.500  0.500  0.000  1.0
  Ce  Ce1  1  0.000  0.000  0.500  1.0
  Sb  Sb2  1  0.102  0.102  0.190  1.0
  Sb  Sb3  1  0.898  0.898  0.810  1.0
  Pt  Pt4  1  0.571  0.074  0.278  1.0
  Pt  Pt5  1  0.074  0.571  0.278  1.0
  Pt  Pt6  1  0.429  0.926  0.722  1.0
  Pt  Pt7  1  0.926  0.429  0.722  1.0
  Pt  Pt8  1  0.575  0.575  0.269  1.0
  Pt  Pt9  1  0.425  0.425  0.731  1.0
  Pt  Pt10  1  0.825  0.825  0.052  1.0
  Pt  Pt11  1  0.175  0.175  0.948  1.0
  Pt  Pt12  1  0.340  0.340  0.496  1.0
  Pt  Pt13  1  0.660  0.660  0.504  1.0
[/CIF]
.
The material structure described by CePt5Sb crystallizes in the monoclinic C2/m space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded to two equivalent Pt(2), four equivalent Pt(1), and six equivalent Pt(3) atoms to form distorted CePt12 cuboctahedra that share edges with six equivalent Ce(1)Pt12 cuboctahedra, edges with eight equivalent Pt(1)Ce3Sb2Pt7 cuboctahedra, edges with six equivalent Ce(2)Sb2Pt18 hexagonal bipyramids, and faces with four equivalent Pt(1)Ce3Sb2Pt7 cuboctahedra. In the second Ce site, Ce(2) is bonded to four equivalent Pt(2), six equivalent Pt(4), eight equivalent Pt(1), and two equivalent Sb(1) atoms to form distorted CeSb2Pt18 hexagonal bipyramids that share edges with six equivalent Ce(1)Pt12 cuboctahedra, faces with sixteen equivalent Pt(1)Ce3Sb2Pt7 cuboctahedra, and faces with six equivalent Ce(2)Sb2Pt18 hexagonal bipyramids. There are four inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to one Ce(1), two equivalent Ce(2), one Pt(3), two equivalent Pt(1), two equivalent Pt(2), two equivalent Pt(4), and two equivalent Sb(1) atoms to form distorted PtCe3Sb2Pt7 cuboctahedra that share corners with ten equivalent Pt(1)Ce3Sb2Pt7 cuboctahedra, edges with two equivalent Ce(1)Pt12 cuboctahedra, edges with four equivalent Pt(1)Ce3Sb2Pt7 cuboctahedra,  a faceface with one Ce(1)Pt12 cuboctahedra, faces with five equivalent Pt(1)Ce3Sb2Pt7 cuboctahedra, and faces with four equivalent Ce(2)Sb2Pt18 hexagonal bipyramids. In the second Pt site, Pt(2) is bonded in a 12-coordinate geometry to one Ce(1), two equivalent Ce(2), one Pt(3), two equivalent Pt(4), four equivalent Pt(1), and two equivalent Sb(1) atoms. In the third Pt site, Pt(3) is bonded in a 4-coordinate geometry to three equivalent Ce(1), one Pt(2), two equivalent Pt(1), and one Sb(1) atom. In the fourth Pt site, Pt(4) is bonded in a 3-coordinate geometry to three equivalent Ce(2), two equivalent Pt(2), and four equivalent Pt(1) atoms. Sb(1) is bonded in a 8-coordinate geometry to one Ce(2), one Pt(3), two equivalent Pt(2), and four equivalent Pt(1) atoms. is represented by the CIF card [CIF]
data_CeSbPt5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.388
_cell_length_b   5.388
_cell_length_c   10.933
_cell_angle_alpha   75.595
_cell_angle_beta   75.595
_cell_angle_gamma   60.255
_symmetry_Int_Tables_number   1
_cell_volume   263.956
_cell_formula_units_Z   2
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  0.500  0.500  0.000  1.0
  Ce  Ce1  1  0.000  0.000  0.500  1.0
  Sb  Sb2  1  0.102  0.102  0.190  1.0
  Sb  Sb3  1  0.898  0.898  0.810  1.0
  Pt  Pt4  1  0.571  0.074  0.278  1.0
  Pt  Pt5  1  0.074  0.571  0.278  1.0
  Pt  Pt6  1  0.429  0.926  0.722  1.0
  Pt  Pt7  1  0.926  0.429  0.722  1.0
  Pt  Pt8  1  0.575  0.575  0.269  1.0
  Pt  Pt9  1  0.425  0.425  0.731  1.0
  Pt  Pt10  1  0.825  0.825  0.052  1.0
  Pt  Pt11  1  0.175  0.175  0.948  1.0
  Pt  Pt12  1  0.340  0.340  0.496  1.0
  Pt  Pt13  1  0.660  0.660  0.504  1.0
[/CIF]
.