The structure described by Ba8Ce3(SbO6)4 crystallizes in the tetragonal I4/mmm space group. Ba(1) is bonded to one O(2), one O(6), two equivalent O(1), two equivalent O(4), two equivalent O(5), and four equivalent O(3) atoms to form distorted BaO12 cuboctahedra that share corners with twelve equivalent Ba(1)O12 cuboctahedra, faces with six equivalent Ba(1)O12 cuboctahedra,  a faceface with one Ce(2)O6 octahedra, faces with two equivalent Ce(1)O6 octahedra, faces with two equivalent Sb(1)O6 octahedra, and faces with two equivalent Sb(2)O6 octahedra. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded to two equivalent O(4) and four equivalent O(3) atoms to form CeO6 octahedra that share corners with two equivalent Sb(2)O6 octahedra, corners with four equivalent Sb(1)O6 octahedra, and faces with eight equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the second Ce site, Ce(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form CeO6 octahedra that share corners with two equivalent Sb(1)O6 octahedra, corners with four equivalent Sb(2)O6 octahedra, and faces with eight equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(2), one O(6), and four equivalent O(3) atoms to form SbO6 octahedra that share  a cornercorner with one Ce(2)O6 octahedra, corners with four equivalent Ce(1)O6 octahedra, and faces with eight equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the second Sb site, Sb(2) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms to form SbO6 octahedra that share corners with two equivalent Ce(1)O6 octahedra, corners with two equivalent Ce(2)O6 octahedra, and faces with eight equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. There are six inequivalent O sites. In the first O site, O(3) is bonded in a distorted linear geometry to four equivalent Ba(1), one Ce(1), and one Sb(1) atom. In the second O site, O(4) is bonded in a distorted linear geometry to four equivalent Ba(1), one Ce(1), and one Sb(2) atom. In the third O site, O(5) is bonded to four equivalent Ba(1) and one Sb(2) atom to form a mixture of distorted corner and edge-sharing OBa4Sb square pyramids. In the fourth O site, O(6) is bonded to four equivalent Ba(1) and one Sb(1) atom to form distorted edge-sharing OBa4Sb square pyramids. In the fifth O site, O(1) is bonded in a distorted linear geometry to four equivalent Ba(1), one Ce(2), and one Sb(2) atom. In the sixth O site, O(2) is bonded in a linear geometry to four equivalent Ba(1), one Ce(2), and one Sb(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ba8Ce3(SbO6)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.536
_cell_length_b   10.536
_cell_length_c   10.536
_cell_angle_alpha   131.975
_cell_angle_beta   131.975
_cell_angle_gamma   70.269
_symmetry_Int_Tables_number   1
_cell_volume   633.539
_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
  Ba  Ba0  1  0.346  0.346  0.459  1.0
  Ba  Ba1  1  0.887  0.346  0.000  1.0
  Ba  Ba2  1  0.113  0.113  0.459  1.0
  Ba  Ba3  1  0.113  0.654  0.000  1.0
  Ba  Ba4  1  0.346  0.887  0.000  1.0
  Ba  Ba5  1  0.654  0.654  0.541  1.0
  Ba  Ba6  1  0.654  0.113  0.000  1.0
  Ba  Ba7  1  0.887  0.887  0.541  1.0
  Ce  Ce8  1  0.750  0.250  0.500  1.0
  Ce  Ce9  1  0.250  0.750  0.500  1.0
  Ce  Ce10  1  0.500  0.500  0.000  1.0
  Sb  Sb11  1  0.745  0.745  0.000  1.0
  Sb  Sb12  1  0.255  0.255  0.000  1.0
  Sb  Sb13  1  0.000  0.500  0.500  1.0
  Sb  Sb14  1  0.500  0.000  0.500  1.0
  O  O15  1  0.500  0.240  0.740  1.0
  O  O16  1  0.371  0.371  0.000  1.0
  O  O17  1  0.746  0.985  0.239  1.0
  O  O18  1  0.254  0.015  0.761  1.0
  O  O19  1  0.507  0.746  0.761  1.0
  O  O20  1  0.500  0.760  0.260  1.0
  O  O21  1  0.380  0.880  0.500  1.0
  O  O22  1  0.273  0.000  0.273  1.0
  O  O23  1  0.493  0.254  0.239  1.0
  O  O24  1  0.760  0.500  0.260  1.0
  O  O25  1  0.620  0.120  0.500  1.0
  O  O26  1  0.015  0.254  0.761  1.0
  O  O27  1  0.746  0.507  0.761  1.0
  O  O28  1  0.629  0.629  0.000  1.0
  O  O29  1  0.727  0.000  0.727  1.0
  O  O30  1  0.240  0.500  0.740  1.0
  O  O31  1  0.000  0.727  0.727  1.0
  O  O32  1  0.985  0.746  0.239  1.0
  O  O33  1  0.141  0.141  0.000  1.0
  O  O34  1  0.120  0.620  0.500  1.0
  O  O35  1  0.859  0.859  0.000  1.0
  O  O36  1  0.000  0.273  0.273  1.0
  O  O37  1  0.254  0.493  0.239  1.0
  O  O38  1  0.880  0.380  0.500  1.0
[/CIF]
.
The structure described by Ba8Ce3(SbO6)4 crystallizes in the tetragonal I4/mmm space group. Ba(1) is bonded to one O(2), one O(6), two equivalent O(1), two equivalent O(4), two equivalent O(5), and four equivalent O(3) atoms to form distorted BaO12 cuboctahedra that share corners with twelve equivalent Ba(1)O12 cuboctahedra, faces with six equivalent Ba(1)O12 cuboctahedra,  a faceface with one Ce(2)O6 octahedra, faces with two equivalent Ce(1)O6 octahedra, faces with two equivalent Sb(1)O6 octahedra, and faces with two equivalent Sb(2)O6 octahedra. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded to two equivalent O(4) and four equivalent O(3) atoms to form CeO6 octahedra that share corners with two equivalent Sb(2)O6 octahedra, corners with four equivalent Sb(1)O6 octahedra, and faces with eight equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the second Ce site, Ce(2) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form CeO6 octahedra that share corners with two equivalent Sb(1)O6 octahedra, corners with four equivalent Sb(2)O6 octahedra, and faces with eight equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to one O(2), one O(6), and four equivalent O(3) atoms to form SbO6 octahedra that share  a cornercorner with one Ce(2)O6 octahedra, corners with four equivalent Ce(1)O6 octahedra, and faces with eight equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the second Sb site, Sb(2) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms to form SbO6 octahedra that share corners with two equivalent Ce(1)O6 octahedra, corners with two equivalent Ce(2)O6 octahedra, and faces with eight equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedra are not tilted. There are six inequivalent O sites. In the first O site, O(3) is bonded in a distorted linear geometry to four equivalent Ba(1), one Ce(1), and one Sb(1) atom. In the second O site, O(4) is bonded in a distorted linear geometry to four equivalent Ba(1), one Ce(1), and one Sb(2) atom. In the third O site, O(5) is bonded to four equivalent Ba(1) and one Sb(2) atom to form a mixture of distorted corner and edge-sharing OBa4Sb square pyramids. In the fourth O site, O(6) is bonded to four equivalent Ba(1) and one Sb(1) atom to form distorted edge-sharing OBa4Sb square pyramids. In the fifth O site, O(1) is bonded in a distorted linear geometry to four equivalent Ba(1), one Ce(2), and one Sb(2) atom. In the sixth O site, O(2) is bonded in a linear geometry to four equivalent Ba(1), one Ce(2), and one Sb(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ba8Ce3(SbO6)4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.536
_cell_length_b   10.536
_cell_length_c   10.536
_cell_angle_alpha   131.975
_cell_angle_beta   131.975
_cell_angle_gamma   70.269
_symmetry_Int_Tables_number   1
_cell_volume   633.539
_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
  Ba  Ba0  1  0.346  0.346  0.459  1.0
  Ba  Ba1  1  0.887  0.346  0.000  1.0
  Ba  Ba2  1  0.113  0.113  0.459  1.0
  Ba  Ba3  1  0.113  0.654  0.000  1.0
  Ba  Ba4  1  0.346  0.887  0.000  1.0
  Ba  Ba5  1  0.654  0.654  0.541  1.0
  Ba  Ba6  1  0.654  0.113  0.000  1.0
  Ba  Ba7  1  0.887  0.887  0.541  1.0
  Ce  Ce8  1  0.750  0.250  0.500  1.0
  Ce  Ce9  1  0.250  0.750  0.500  1.0
  Ce  Ce10  1  0.500  0.500  0.000  1.0
  Sb  Sb11  1  0.745  0.745  0.000  1.0
  Sb  Sb12  1  0.255  0.255  0.000  1.0
  Sb  Sb13  1  0.000  0.500  0.500  1.0
  Sb  Sb14  1  0.500  0.000  0.500  1.0
  O  O15  1  0.500  0.240  0.740  1.0
  O  O16  1  0.371  0.371  0.000  1.0
  O  O17  1  0.746  0.985  0.239  1.0
  O  O18  1  0.254  0.015  0.761  1.0
  O  O19  1  0.507  0.746  0.761  1.0
  O  O20  1  0.500  0.760  0.260  1.0
  O  O21  1  0.380  0.880  0.500  1.0
  O  O22  1  0.273  0.000  0.273  1.0
  O  O23  1  0.493  0.254  0.239  1.0
  O  O24  1  0.760  0.500  0.260  1.0
  O  O25  1  0.620  0.120  0.500  1.0
  O  O26  1  0.015  0.254  0.761  1.0
  O  O27  1  0.746  0.507  0.761  1.0
  O  O28  1  0.629  0.629  0.000  1.0
  O  O29  1  0.727  0.000  0.727  1.0
  O  O30  1  0.240  0.500  0.740  1.0
  O  O31  1  0.000  0.727  0.727  1.0
  O  O32  1  0.985  0.746  0.239  1.0
  O  O33  1  0.141  0.141  0.000  1.0
  O  O34  1  0.120  0.620  0.500  1.0
  O  O35  1  0.859  0.859  0.000  1.0
  O  O36  1  0.000  0.273  0.273  1.0
  O  O37  1  0.254  0.493  0.239  1.0
  O  O38  1  0.880  0.380  0.500  1.0
[/CIF]
.