The material described by Ce4Y2O11 is alpha bismuth trifluoride-derived structured and crystallizes in the tetragonal P-4m2 space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a body-centered cubic geometry to two equivalent O(2), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. In the second Ce site, Ce(2) is bonded in a body-centered cubic geometry to two equivalent O(4), two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms. Y(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. There are seven inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Y(1) atoms to form OY4 tetrahedra that share corners with four equivalent O(3)Ce2Y2 tetrahedra, corners with four equivalent O(1)Y4 tetrahedra, corners with eight equivalent O(2)Ce2Y2 tetrahedra, and edges with two equivalent O(3)Ce2Y2 tetrahedra. In the second O site, O(2) is bonded to two equivalent Ce(1) and two equivalent Y(1) atoms to form OCe2Y2 tetrahedra that share corners with two equivalent O(5)Ce4 tetrahedra, corners with four equivalent O(2)Ce2Y2 tetrahedra, corners with four equivalent O(4)Ce4 tetrahedra, corners with four equivalent O(1)Y4 tetrahedra,  an edgeedge with one O(5)Ce4 tetrahedra, and edges with four equivalent O(3)Ce2Y2 tetrahedra. In the third O site, O(3) is bonded to two equivalent Ce(1) and two equivalent Y(1) atoms to form OCe2Y2 tetrahedra that share corners with two equivalent O(4)Ce4 tetrahedra, corners with two equivalent O(1)Y4 tetrahedra, corners with four equivalent O(3)Ce2Y2 tetrahedra, corners with four equivalent O(5)Ce4 tetrahedra,  an edgeedge with one O(4)Ce4 tetrahedra,  an edgeedge with one O(1)Y4 tetrahedra, and edges with four equivalent O(2)Ce2Y2 tetrahedra. In the fourth O site, O(4) is bonded to two equivalent Ce(1) and two equivalent Ce(2) atoms to form OCe4 tetrahedra that share corners with two equivalent O(3)Ce2Y2 tetrahedra, corners with two equivalent O(7)Ce4 tetrahedra, corners with four equivalent O(2)Ce2Y2 tetrahedra, corners with four equivalent O(4)Ce4 tetrahedra, corners with four equivalent O(6)Ce4 tetrahedra,  an edgeedge with one O(3)Ce2Y2 tetrahedra,  an edgeedge with one O(7)Ce4 tetrahedra, and edges with four equivalent O(5)Ce4 tetrahedra. In the fifth O site, O(5) is bonded to two equivalent Ce(1) and two equivalent Ce(2) atoms to form OCe4 tetrahedra that share corners with two equivalent O(2)Ce2Y2 tetrahedra, corners with two equivalent O(6)Ce4 tetrahedra, corners with four equivalent O(3)Ce2Y2 tetrahedra, corners with four equivalent O(5)Ce4 tetrahedra, corners with four equivalent O(7)Ce4 tetrahedra,  an edgeedge with one O(2)Ce2Y2 tetrahedra,  an edgeedge with one O(6)Ce4 tetrahedra, and edges with four equivalent O(4)Ce4 tetrahedra. In the sixth O site, O(6) is bonded to four equivalent Ce(2) atoms to form a mixture of edge and corner-sharing OCe4 tetrahedra. In the seventh O site, O(7) is bonded to four equivalent Ce(2) atoms to form a mixture of edge and corner-sharing OCe4 tetrahedra. is represented by the CIF card [CIF]
data_Ce4Y2O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.859
_cell_length_b   3.859
_cell_length_c   16.351
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   243.445
_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  0.000  0.249  1.0
  Ce  Ce1  1  0.000  0.500  0.417  1.0
  Ce  Ce2  1  0.500  0.000  0.583  1.0
  Ce  Ce3  1  0.000  0.500  0.751  1.0
  Y  Y4  1  0.500  0.000  0.907  1.0
  Y  Y5  1  0.000  0.500  0.093  1.0
  O  O6  1  0.500  0.500  0.000  1.0
  O  O7  1  0.000  0.000  0.154  1.0
  O  O8  1  0.500  0.500  0.174  1.0
  O  O9  1  0.500  0.500  0.337  1.0
  O  O10  1  0.000  0.000  0.329  1.0
  O  O11  1  0.000  0.000  0.500  1.0
  O  O12  1  0.500  0.500  0.500  1.0
  O  O13  1  0.000  0.000  0.671  1.0
  O  O14  1  0.500  0.500  0.663  1.0
  O  O15  1  0.000  0.000  0.846  1.0
  O  O16  1  0.500  0.500  0.826  1.0
[/CIF]
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The material described by Ce4Y2O11 is alpha bismuth trifluoride-derived structured and crystallizes in the tetragonal P-4m2 space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a body-centered cubic geometry to two equivalent O(2), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. In the second Ce site, Ce(2) is bonded in a body-centered cubic geometry to two equivalent O(4), two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms. Y(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. There are seven inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Y(1) atoms to form OY4 tetrahedra that share corners with four equivalent O(3)Ce2Y2 tetrahedra, corners with four equivalent O(1)Y4 tetrahedra, corners with eight equivalent O(2)Ce2Y2 tetrahedra, and edges with two equivalent O(3)Ce2Y2 tetrahedra. In the second O site, O(2) is bonded to two equivalent Ce(1) and two equivalent Y(1) atoms to form OCe2Y2 tetrahedra that share corners with two equivalent O(5)Ce4 tetrahedra, corners with four equivalent O(2)Ce2Y2 tetrahedra, corners with four equivalent O(4)Ce4 tetrahedra, corners with four equivalent O(1)Y4 tetrahedra,  an edgeedge with one O(5)Ce4 tetrahedra, and edges with four equivalent O(3)Ce2Y2 tetrahedra. In the third O site, O(3) is bonded to two equivalent Ce(1) and two equivalent Y(1) atoms to form OCe2Y2 tetrahedra that share corners with two equivalent O(4)Ce4 tetrahedra, corners with two equivalent O(1)Y4 tetrahedra, corners with four equivalent O(3)Ce2Y2 tetrahedra, corners with four equivalent O(5)Ce4 tetrahedra,  an edgeedge with one O(4)Ce4 tetrahedra,  an edgeedge with one O(1)Y4 tetrahedra, and edges with four equivalent O(2)Ce2Y2 tetrahedra. In the fourth O site, O(4) is bonded to two equivalent Ce(1) and two equivalent Ce(2) atoms to form OCe4 tetrahedra that share corners with two equivalent O(3)Ce2Y2 tetrahedra, corners with two equivalent O(7)Ce4 tetrahedra, corners with four equivalent O(2)Ce2Y2 tetrahedra, corners with four equivalent O(4)Ce4 tetrahedra, corners with four equivalent O(6)Ce4 tetrahedra,  an edgeedge with one O(3)Ce2Y2 tetrahedra,  an edgeedge with one O(7)Ce4 tetrahedra, and edges with four equivalent O(5)Ce4 tetrahedra. In the fifth O site, O(5) is bonded to two equivalent Ce(1) and two equivalent Ce(2) atoms to form OCe4 tetrahedra that share corners with two equivalent O(2)Ce2Y2 tetrahedra, corners with two equivalent O(6)Ce4 tetrahedra, corners with four equivalent O(3)Ce2Y2 tetrahedra, corners with four equivalent O(5)Ce4 tetrahedra, corners with four equivalent O(7)Ce4 tetrahedra,  an edgeedge with one O(2)Ce2Y2 tetrahedra,  an edgeedge with one O(6)Ce4 tetrahedra, and edges with four equivalent O(4)Ce4 tetrahedra. In the sixth O site, O(6) is bonded to four equivalent Ce(2) atoms to form a mixture of edge and corner-sharing OCe4 tetrahedra. In the seventh O site, O(7) is bonded to four equivalent Ce(2) atoms to form a mixture of edge and corner-sharing OCe4 tetrahedra. is represented by the CIF card [CIF]
data_Ce4Y2O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.859
_cell_length_b   3.859
_cell_length_c   16.351
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   243.445
_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  0.000  0.249  1.0
  Ce  Ce1  1  0.000  0.500  0.417  1.0
  Ce  Ce2  1  0.500  0.000  0.583  1.0
  Ce  Ce3  1  0.000  0.500  0.751  1.0
  Y  Y4  1  0.500  0.000  0.907  1.0
  Y  Y5  1  0.000  0.500  0.093  1.0
  O  O6  1  0.500  0.500  0.000  1.0
  O  O7  1  0.000  0.000  0.154  1.0
  O  O8  1  0.500  0.500  0.174  1.0
  O  O9  1  0.500  0.500  0.337  1.0
  O  O10  1  0.000  0.000  0.329  1.0
  O  O11  1  0.000  0.000  0.500  1.0
  O  O12  1  0.500  0.500  0.500  1.0
  O  O13  1  0.000  0.000  0.671  1.0
  O  O14  1  0.500  0.500  0.663  1.0
  O  O15  1  0.000  0.000  0.846  1.0
  O  O16  1  0.500  0.500  0.826  1.0
[/CIF]
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