The compound described by Th3Ce3O11 crystallizes in the monoclinic Pm space group. There are three inequivalent Th sites. In the first Th site, Th(1) is bonded in a body-centered cubic geometry to one O(2), one O(4), one O(5), one O(7), two equivalent O(3), and two equivalent O(6) atoms. In the second Th site, Th(2) is bonded in a body-centered cubic geometry to one O(10), one O(4), one O(7), one O(9), two equivalent O(1), and two equivalent O(8) atoms. In the third Th site, Th(3) is bonded in a body-centered cubic geometry to one O(1), one O(11), one O(6), one O(8), two equivalent O(10), and two equivalent O(7) atoms. There are three inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 7-coordinate geometry to one O(1), one O(3), one O(6), two equivalent O(4), and two equivalent O(5) atoms. In the second Ce site, Ce(2) is bonded in a 7-coordinate geometry to one O(11), one O(3), one O(8), two equivalent O(2), and two equivalent O(9) atoms. In the third Ce site, Ce(3) is bonded in a 6-coordinate geometry to one O(10), one O(2), one O(5), one O(9), and two equivalent O(11) atoms. There are eleven inequivalent O sites. In the first O site, O(1) is bonded to one Th(3), two equivalent Th(2), and one Ce(1) atom to form OCeTh3 tetrahedra that share  a cornercorner with one O(3)Ce2Th2 tetrahedra,  a cornercorner with one O(11)Ce3Th tetrahedra, corners with two equivalent O(5)Ce3Th tetrahedra, corners with two equivalent O(9)Ce3Th tetrahedra, corners with two equivalent O(1)CeTh3 tetrahedra, corners with three equivalent O(8)CeTh3 tetrahedra, corners with four equivalent O(7)Th4 tetrahedra,  an edgeedge with one O(6)CeTh3 tetrahedra,  an edgeedge with one O(8)CeTh3 tetrahedra, edges with two equivalent O(4)Ce2Th2 tetrahedra, and edges with two equivalent O(10)CeTh3 tetrahedra. In the second O site, O(2) is bonded to one Th(1), one Ce(3), and two equivalent Ce(2) atoms to form OCe3Th tetrahedra that share  a cornercorner with one O(4)Ce2Th2 tetrahedra,  a cornercorner with one O(10)CeTh3 tetrahedra,  a cornercorner with one O(7)Th4 tetrahedra, corners with two equivalent O(2)Ce3Th tetrahedra, corners with two equivalent O(6)CeTh3 tetrahedra, corners with two equivalent O(8)CeTh3 tetrahedra, corners with three equivalent O(9)Ce3Th tetrahedra,  an edgeedge with one O(5)Ce3Th tetrahedra,  an edgeedge with one O(9)Ce3Th tetrahedra, edges with two equivalent O(3)Ce2Th2 tetrahedra, and edges with two equivalent O(11)Ce3Th tetrahedra. In the third O site, O(3) is bonded to two equivalent Th(1), one Ce(1), and one Ce(2) atom to form OCe2Th2 tetrahedra that share  a cornercorner with one O(11)Ce3Th tetrahedra,  a cornercorner with one O(1)CeTh3 tetrahedra,  a cornercorner with one O(8)CeTh3 tetrahedra, corners with two equivalent O(3)Ce2Th2 tetrahedra, corners with two equivalent O(9)Ce3Th tetrahedra, corners with two equivalent O(7)Th4 tetrahedra, corners with three equivalent O(6)CeTh3 tetrahedra, corners with four equivalent O(5)Ce3Th tetrahedra,  an edgeedge with one O(6)CeTh3 tetrahedra, edges with two equivalent O(4)Ce2Th2 tetrahedra, and edges with two equivalent O(2)Ce3Th tetrahedra. In the fourth O site, O(4) is bonded to one Th(1), one Th(2), and two equivalent Ce(1) atoms to form OCe2Th2 tetrahedra that share  a cornercorner with one O(2)Ce3Th tetrahedra,  a cornercorner with one O(9)Ce3Th tetrahedra,  a cornercorner with one O(10)CeTh3 tetrahedra, corners with two equivalent O(4)Ce2Th2 tetrahedra, corners with two equivalent O(8)CeTh3 tetrahedra, corners with three equivalent O(5)Ce3Th tetrahedra, corners with four equivalent O(6)CeTh3 tetrahedra,  an edgeedge with one O(5)Ce3Th tetrahedra,  an edgeedge with one O(7)Th4 tetrahedra, edges with two equivalent O(3)Ce2Th2 tetrahedra, and edges with two equivalent O(1)CeTh3 tetrahedra. In the fifth O site, O(5) is bonded to one Th(1), one Ce(3), and two equivalent Ce(1) atoms to form OCe3Th tetrahedra that share  a cornercorner with one O(9)Ce3Th tetrahedra,  a cornercorner with one O(10)CeTh3 tetrahedra,  a cornercorner with one O(7)Th4 tetrahedra, corners with two equivalent O(11)Ce3Th tetrahedra, corners with two equivalent O(5)Ce3Th tetrahedra, corners with two equivalent O(1)CeTh3 tetrahedra, corners with three equivalent O(4)Ce2Th2 tetrahedra, corners with four equivalent O(3)Ce2Th2 tetrahedra,  an edgeedge with one O(4)Ce2Th2 tetrahedra,  an edgeedge with one O(2)Ce3Th tetrahedra, and edges with two equivalent O(6)CeTh3 tetrahedra. In the sixth O site, O(6) is bonded to one Th(3), two equivalent Th(1), and one Ce(1) atom to form OCeTh3 tetrahedra that share  a cornercorner with one O(11)Ce3Th tetrahedra,  a cornercorner with one O(8)CeTh3 tetrahedra, corners with two equivalent O(2)Ce3Th tetrahedra, corners with two equivalent O(10)CeTh3 tetrahedra, corners with two equivalent O(6)CeTh3 tetrahedra, corners with three equivalent O(3)Ce2Th2 tetrahedra, corners with four equivalent O(4)Ce2Th2 tetrahedra,  an edgeedge with one O(3)Ce2Th2 tetrahedra,  an edgeedge with one O(1)CeTh3 tetrahedra, edges with two equivalent O(5)Ce3Th tetrahedra, and edges with two equivalent O(7)Th4 tetrahedra. In the seventh O site, O(7) is bonded to one Th(1), one Th(2), and two equivalent Th(3) atoms to form OTh4 tetrahedra that share  a cornercorner with one O(2)Ce3Th tetrahedra,  a cornercorner with one O(5)Ce3Th tetrahedra,  a cornercorner with one O(9)Ce3Th tetrahedra, corners with two equivalent O(3)Ce2Th2 tetrahedra, corners with two equivalent O(11)Ce3Th tetrahedra, corners with two equivalent O(7)Th4 tetrahedra, corners with three equivalent O(10)CeTh3 tetrahedra, corners with four equivalent O(1)CeTh3 tetrahedra,  an edgeedge with one O(4)Ce2Th2 tetrahedra,  an edgeedge with one O(10)CeTh3 tetrahedra, edges with two equivalent O(6)CeTh3 tetrahedra, and edges with two equivalent O(8)CeTh3 tetrahedra. In the eighth O site, O(8) is bonded to one Th(3), two equivalent Th(2), and one Ce(2) atom to form OCeTh3 tetrahedra that share  a cornercorner with one O(3)Ce2Th2 tetrahedra,  a cornercorner with one O(6)CeTh3 tetrahedra, corners with two equivalent O(4)Ce2Th2 tetrahedra, corners with two equivalent O(2)Ce3Th tetrahedra, corners with two equivalent O(8)CeTh3 tetrahedra, corners with three equivalent O(1)CeTh3 tetrahedra, corners with four equivalent O(10)CeTh3 tetrahedra,  an edgeedge with one O(11)Ce3Th tetrahedra,  an edgeedge with one O(1)CeTh3 tetrahedra, edges with two equivalent O(9)Ce3Th tetrahedra, and edges with two equivalent O(7)Th4 tetrahedra. In the ninth O site, O(9) is bonded to one Th(2), one Ce(3), and two equivalent Ce(2) atoms to form OCe3Th tetrahedra that share  a cornercorner with one O(4)Ce2Th2 tetrahedra,  a cornercorner with one O(5)Ce3Th tetrahedra,  a cornercorner with one O(7)Th4 tetrahedra, corners with two equivalent O(3)Ce2Th2 tetrahedra, corners with two equivalent O(9)Ce3Th tetrahedra, corners with two equivalent O(1)CeTh3 tetrahedra, corners with three equivalent O(2)Ce3Th tetrahedra, corners with four equivalent O(11)Ce3Th tetrahedra,  an edgeedge with one O(2)Ce3Th tetrahedra,  an edgeedge with one O(10)CeTh3 tetrahedra, and edges with two equivalent O(8)CeTh3 tetrahedra. In the tenth O site, O(10) is bonded to one Th(2), two equivalent Th(3), and one Ce(3) atom to form OCeTh3 tetrahedra that share  a cornercorner with one O(4)Ce2Th2 tetrahedra,  a cornercorner with one O(2)Ce3Th tetrahedra,  a cornercorner with one O(5)Ce3Th tetrahedra, corners with two equivalent O(10)CeTh3 tetrahedra, corners with two equivalent O(6)CeTh3 tetrahedra, corners with three equivalent O(7)Th4 tetrahedra, corners with four equivalent O(8)CeTh3 tetrahedra,  an edgeedge with one O(9)Ce3Th tetrahedra,  an edgeedge with one O(7)Th4 tetrahedra, edges with two equivalent O(11)Ce3Th tetrahedra, and edges with two equivalent O(1)CeTh3 tetrahedra. In the eleventh O site, O(11) is bonded to one Th(3), one Ce(2), and two equivalent Ce(3) atoms to form OCe3Th tetrahedra that share  a cornercorner with one O(3)Ce2Th2 tetrahedra,  a cornercorner with one O(1)CeTh3 tetrahedra,  a cornercorner with one O(6)CeTh3 tetrahedra, corners with two equivalent O(11)Ce3Th tetrahedra, corners with two equivalent O(5)Ce3Th tetrahedra, corners with two equivalent O(7)Th4 tetrahedra, corners with four equivalent O(9)Ce3Th tetrahedra,  an edgeedge with one O(8)CeTh3 tetrahedra, edges with two equivalent O(2)Ce3Th tetrahedra, and edges with two equivalent O(10)CeTh3 tetrahedra. is represented by the CIF file [CIF]
data_Ce3Th3O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.933
_cell_length_b   6.874
_cell_length_c   9.676
_cell_angle_alpha   90.044
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   261.550
_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  0.500  0.830  0.656  1.0
  Ce  Ce1  1  0.500  0.485  0.000  1.0
  Ce  Ce2  1  0.000  0.013  0.006  1.0
  Th  Th3  1  0.000  0.338  0.673  1.0
  Th  Th4  1  0.000  0.668  0.329  1.0
  Th  Th5  1  0.500  0.167  0.336  1.0
  O  O6  1  0.500  0.833  0.413  1.0
  O  O7  1  0.000  0.332  0.918  1.0
  O  O8  1  0.500  0.516  0.759  1.0
  O  O9  1  0.000  0.662  0.576  1.0
  O  O10  1  0.000  0.980  0.768  1.0
  O  O11  1  0.500  0.171  0.589  1.0
  O  O12  1  0.000  0.334  0.418  1.0
  O  O13  1  0.500  0.497  0.245  1.0
  O  O14  1  0.000  0.686  0.066  1.0
  O  O15  1  0.000  0.003  0.255  1.0
  O  O16  1  0.500  0.151  0.078  1.0
[/CIF]
.
The compound described by Th3Ce3O11 crystallizes in the monoclinic Pm space group. There are three inequivalent Th sites. In the first Th site, Th(1) is bonded in a body-centered cubic geometry to one O(2), one O(4), one O(5), one O(7), two equivalent O(3), and two equivalent O(6) atoms. In the second Th site, Th(2) is bonded in a body-centered cubic geometry to one O(10), one O(4), one O(7), one O(9), two equivalent O(1), and two equivalent O(8) atoms. In the third Th site, Th(3) is bonded in a body-centered cubic geometry to one O(1), one O(11), one O(6), one O(8), two equivalent O(10), and two equivalent O(7) atoms. There are three inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 7-coordinate geometry to one O(1), one O(3), one O(6), two equivalent O(4), and two equivalent O(5) atoms. In the second Ce site, Ce(2) is bonded in a 7-coordinate geometry to one O(11), one O(3), one O(8), two equivalent O(2), and two equivalent O(9) atoms. In the third Ce site, Ce(3) is bonded in a 6-coordinate geometry to one O(10), one O(2), one O(5), one O(9), and two equivalent O(11) atoms. There are eleven inequivalent O sites. In the first O site, O(1) is bonded to one Th(3), two equivalent Th(2), and one Ce(1) atom to form OCeTh3 tetrahedra that share  a cornercorner with one O(3)Ce2Th2 tetrahedra,  a cornercorner with one O(11)Ce3Th tetrahedra, corners with two equivalent O(5)Ce3Th tetrahedra, corners with two equivalent O(9)Ce3Th tetrahedra, corners with two equivalent O(1)CeTh3 tetrahedra, corners with three equivalent O(8)CeTh3 tetrahedra, corners with four equivalent O(7)Th4 tetrahedra,  an edgeedge with one O(6)CeTh3 tetrahedra,  an edgeedge with one O(8)CeTh3 tetrahedra, edges with two equivalent O(4)Ce2Th2 tetrahedra, and edges with two equivalent O(10)CeTh3 tetrahedra. In the second O site, O(2) is bonded to one Th(1), one Ce(3), and two equivalent Ce(2) atoms to form OCe3Th tetrahedra that share  a cornercorner with one O(4)Ce2Th2 tetrahedra,  a cornercorner with one O(10)CeTh3 tetrahedra,  a cornercorner with one O(7)Th4 tetrahedra, corners with two equivalent O(2)Ce3Th tetrahedra, corners with two equivalent O(6)CeTh3 tetrahedra, corners with two equivalent O(8)CeTh3 tetrahedra, corners with three equivalent O(9)Ce3Th tetrahedra,  an edgeedge with one O(5)Ce3Th tetrahedra,  an edgeedge with one O(9)Ce3Th tetrahedra, edges with two equivalent O(3)Ce2Th2 tetrahedra, and edges with two equivalent O(11)Ce3Th tetrahedra. In the third O site, O(3) is bonded to two equivalent Th(1), one Ce(1), and one Ce(2) atom to form OCe2Th2 tetrahedra that share  a cornercorner with one O(11)Ce3Th tetrahedra,  a cornercorner with one O(1)CeTh3 tetrahedra,  a cornercorner with one O(8)CeTh3 tetrahedra, corners with two equivalent O(3)Ce2Th2 tetrahedra, corners with two equivalent O(9)Ce3Th tetrahedra, corners with two equivalent O(7)Th4 tetrahedra, corners with three equivalent O(6)CeTh3 tetrahedra, corners with four equivalent O(5)Ce3Th tetrahedra,  an edgeedge with one O(6)CeTh3 tetrahedra, edges with two equivalent O(4)Ce2Th2 tetrahedra, and edges with two equivalent O(2)Ce3Th tetrahedra. In the fourth O site, O(4) is bonded to one Th(1), one Th(2), and two equivalent Ce(1) atoms to form OCe2Th2 tetrahedra that share  a cornercorner with one O(2)Ce3Th tetrahedra,  a cornercorner with one O(9)Ce3Th tetrahedra,  a cornercorner with one O(10)CeTh3 tetrahedra, corners with two equivalent O(4)Ce2Th2 tetrahedra, corners with two equivalent O(8)CeTh3 tetrahedra, corners with three equivalent O(5)Ce3Th tetrahedra, corners with four equivalent O(6)CeTh3 tetrahedra,  an edgeedge with one O(5)Ce3Th tetrahedra,  an edgeedge with one O(7)Th4 tetrahedra, edges with two equivalent O(3)Ce2Th2 tetrahedra, and edges with two equivalent O(1)CeTh3 tetrahedra. In the fifth O site, O(5) is bonded to one Th(1), one Ce(3), and two equivalent Ce(1) atoms to form OCe3Th tetrahedra that share  a cornercorner with one O(9)Ce3Th tetrahedra,  a cornercorner with one O(10)CeTh3 tetrahedra,  a cornercorner with one O(7)Th4 tetrahedra, corners with two equivalent O(11)Ce3Th tetrahedra, corners with two equivalent O(5)Ce3Th tetrahedra, corners with two equivalent O(1)CeTh3 tetrahedra, corners with three equivalent O(4)Ce2Th2 tetrahedra, corners with four equivalent O(3)Ce2Th2 tetrahedra,  an edgeedge with one O(4)Ce2Th2 tetrahedra,  an edgeedge with one O(2)Ce3Th tetrahedra, and edges with two equivalent O(6)CeTh3 tetrahedra. In the sixth O site, O(6) is bonded to one Th(3), two equivalent Th(1), and one Ce(1) atom to form OCeTh3 tetrahedra that share  a cornercorner with one O(11)Ce3Th tetrahedra,  a cornercorner with one O(8)CeTh3 tetrahedra, corners with two equivalent O(2)Ce3Th tetrahedra, corners with two equivalent O(10)CeTh3 tetrahedra, corners with two equivalent O(6)CeTh3 tetrahedra, corners with three equivalent O(3)Ce2Th2 tetrahedra, corners with four equivalent O(4)Ce2Th2 tetrahedra,  an edgeedge with one O(3)Ce2Th2 tetrahedra,  an edgeedge with one O(1)CeTh3 tetrahedra, edges with two equivalent O(5)Ce3Th tetrahedra, and edges with two equivalent O(7)Th4 tetrahedra. In the seventh O site, O(7) is bonded to one Th(1), one Th(2), and two equivalent Th(3) atoms to form OTh4 tetrahedra that share  a cornercorner with one O(2)Ce3Th tetrahedra,  a cornercorner with one O(5)Ce3Th tetrahedra,  a cornercorner with one O(9)Ce3Th tetrahedra, corners with two equivalent O(3)Ce2Th2 tetrahedra, corners with two equivalent O(11)Ce3Th tetrahedra, corners with two equivalent O(7)Th4 tetrahedra, corners with three equivalent O(10)CeTh3 tetrahedra, corners with four equivalent O(1)CeTh3 tetrahedra,  an edgeedge with one O(4)Ce2Th2 tetrahedra,  an edgeedge with one O(10)CeTh3 tetrahedra, edges with two equivalent O(6)CeTh3 tetrahedra, and edges with two equivalent O(8)CeTh3 tetrahedra. In the eighth O site, O(8) is bonded to one Th(3), two equivalent Th(2), and one Ce(2) atom to form OCeTh3 tetrahedra that share  a cornercorner with one O(3)Ce2Th2 tetrahedra,  a cornercorner with one O(6)CeTh3 tetrahedra, corners with two equivalent O(4)Ce2Th2 tetrahedra, corners with two equivalent O(2)Ce3Th tetrahedra, corners with two equivalent O(8)CeTh3 tetrahedra, corners with three equivalent O(1)CeTh3 tetrahedra, corners with four equivalent O(10)CeTh3 tetrahedra,  an edgeedge with one O(11)Ce3Th tetrahedra,  an edgeedge with one O(1)CeTh3 tetrahedra, edges with two equivalent O(9)Ce3Th tetrahedra, and edges with two equivalent O(7)Th4 tetrahedra. In the ninth O site, O(9) is bonded to one Th(2), one Ce(3), and two equivalent Ce(2) atoms to form OCe3Th tetrahedra that share  a cornercorner with one O(4)Ce2Th2 tetrahedra,  a cornercorner with one O(5)Ce3Th tetrahedra,  a cornercorner with one O(7)Th4 tetrahedra, corners with two equivalent O(3)Ce2Th2 tetrahedra, corners with two equivalent O(9)Ce3Th tetrahedra, corners with two equivalent O(1)CeTh3 tetrahedra, corners with three equivalent O(2)Ce3Th tetrahedra, corners with four equivalent O(11)Ce3Th tetrahedra,  an edgeedge with one O(2)Ce3Th tetrahedra,  an edgeedge with one O(10)CeTh3 tetrahedra, and edges with two equivalent O(8)CeTh3 tetrahedra. In the tenth O site, O(10) is bonded to one Th(2), two equivalent Th(3), and one Ce(3) atom to form OCeTh3 tetrahedra that share  a cornercorner with one O(4)Ce2Th2 tetrahedra,  a cornercorner with one O(2)Ce3Th tetrahedra,  a cornercorner with one O(5)Ce3Th tetrahedra, corners with two equivalent O(10)CeTh3 tetrahedra, corners with two equivalent O(6)CeTh3 tetrahedra, corners with three equivalent O(7)Th4 tetrahedra, corners with four equivalent O(8)CeTh3 tetrahedra,  an edgeedge with one O(9)Ce3Th tetrahedra,  an edgeedge with one O(7)Th4 tetrahedra, edges with two equivalent O(11)Ce3Th tetrahedra, and edges with two equivalent O(1)CeTh3 tetrahedra. In the eleventh O site, O(11) is bonded to one Th(3), one Ce(2), and two equivalent Ce(3) atoms to form OCe3Th tetrahedra that share  a cornercorner with one O(3)Ce2Th2 tetrahedra,  a cornercorner with one O(1)CeTh3 tetrahedra,  a cornercorner with one O(6)CeTh3 tetrahedra, corners with two equivalent O(11)Ce3Th tetrahedra, corners with two equivalent O(5)Ce3Th tetrahedra, corners with two equivalent O(7)Th4 tetrahedra, corners with four equivalent O(9)Ce3Th tetrahedra,  an edgeedge with one O(8)CeTh3 tetrahedra, edges with two equivalent O(2)Ce3Th tetrahedra, and edges with two equivalent O(10)CeTh3 tetrahedra. is represented by the CIF file [CIF]
data_Ce3Th3O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.933
_cell_length_b   6.874
_cell_length_c   9.676
_cell_angle_alpha   90.044
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   261.550
_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  0.500  0.830  0.656  1.0
  Ce  Ce1  1  0.500  0.485  0.000  1.0
  Ce  Ce2  1  0.000  0.013  0.006  1.0
  Th  Th3  1  0.000  0.338  0.673  1.0
  Th  Th4  1  0.000  0.668  0.329  1.0
  Th  Th5  1  0.500  0.167  0.336  1.0
  O  O6  1  0.500  0.833  0.413  1.0
  O  O7  1  0.000  0.332  0.918  1.0
  O  O8  1  0.500  0.516  0.759  1.0
  O  O9  1  0.000  0.662  0.576  1.0
  O  O10  1  0.000  0.980  0.768  1.0
  O  O11  1  0.500  0.171  0.589  1.0
  O  O12  1  0.000  0.334  0.418  1.0
  O  O13  1  0.500  0.497  0.245  1.0
  O  O14  1  0.000  0.686  0.066  1.0
  O  O15  1  0.000  0.003  0.255  1.0
  O  O16  1  0.500  0.151  0.078  1.0
[/CIF]
.