The compound described by Ce5O9 crystallizes in the monoclinic C2 space group. 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(5), two equivalent O(2), and two equivalent O(4) atoms. In the second Ce site, Ce(2) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(4), two equivalent O(3), and two equivalent O(5) atoms. In the third Ce site, Ce(3) 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. There are five inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ce(1) and two equivalent Ce(2) atoms to form a mixture of edge and corner-sharing OCe4 tetrahedra. In the second O site, O(2) is bonded to one Ce(2), one Ce(3), and two equivalent Ce(1) atoms to form a mixture of edge and corner-sharing OCe4 tetrahedra. In the third O site, O(3) is bonded to one Ce(1), one Ce(3), and two equivalent Ce(2) atoms to form a mixture of edge and corner-sharing OCe4 tetrahedra. In the fourth O site, O(4) is bonded to one Ce(2), one Ce(3), and two equivalent Ce(1) atoms to form a mixture of distorted edge and corner-sharing OCe4 tetrahedra. In the fifth O site, O(5) is bonded to one Ce(1), one Ce(3), and two equivalent Ce(2) atoms to form a mixture of edge and corner-sharing OCe4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ce5O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.728
_cell_length_b   5.558
_cell_length_c   6.718
_cell_angle_alpha   114.431
_cell_angle_beta   99.773
_cell_angle_gamma   65.608
_symmetry_Int_Tables_number   1
_cell_volume   208.318
_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  0.999  0.988  0.022  1.0
  Ce  Ce1  1  0.422  0.214  0.801  1.0
  Ce  Ce2  1  0.201  0.564  0.378  1.0
  Ce  Ce3  1  0.778  0.434  0.599  1.0
  Ce  Ce4  1  0.600  0.799  0.200  1.0
  O  O5  1  0.100  0.551  0.700  1.0
  O  O6  1  0.321  0.634  0.100  1.0
  O  O7  1  0.700  0.866  0.922  1.0
  O  O8  1  0.500  0.244  0.477  1.0
  O  O9  1  0.271  0.145  0.061  1.0
  O  O10  1  0.738  0.317  0.873  1.0
  O  O11  1  0.462  0.782  0.527  1.0
  O  O12  1  0.878  0.456  0.300  1.0
  O  O13  1  0.929  0.955  0.339  1.0
[/CIF]
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The compound described by Ce5O9 crystallizes in the monoclinic C2 space group. 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(5), two equivalent O(2), and two equivalent O(4) atoms. In the second Ce site, Ce(2) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(4), two equivalent O(3), and two equivalent O(5) atoms. In the third Ce site, Ce(3) 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. There are five inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ce(1) and two equivalent Ce(2) atoms to form a mixture of edge and corner-sharing OCe4 tetrahedra. In the second O site, O(2) is bonded to one Ce(2), one Ce(3), and two equivalent Ce(1) atoms to form a mixture of edge and corner-sharing OCe4 tetrahedra. In the third O site, O(3) is bonded to one Ce(1), one Ce(3), and two equivalent Ce(2) atoms to form a mixture of edge and corner-sharing OCe4 tetrahedra. In the fourth O site, O(4) is bonded to one Ce(2), one Ce(3), and two equivalent Ce(1) atoms to form a mixture of distorted edge and corner-sharing OCe4 tetrahedra. In the fifth O site, O(5) is bonded to one Ce(1), one Ce(3), and two equivalent Ce(2) atoms to form a mixture of edge and corner-sharing OCe4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ce5O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.728
_cell_length_b   5.558
_cell_length_c   6.718
_cell_angle_alpha   114.431
_cell_angle_beta   99.773
_cell_angle_gamma   65.608
_symmetry_Int_Tables_number   1
_cell_volume   208.318
_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  0.999  0.988  0.022  1.0
  Ce  Ce1  1  0.422  0.214  0.801  1.0
  Ce  Ce2  1  0.201  0.564  0.378  1.0
  Ce  Ce3  1  0.778  0.434  0.599  1.0
  Ce  Ce4  1  0.600  0.799  0.200  1.0
  O  O5  1  0.100  0.551  0.700  1.0
  O  O6  1  0.321  0.634  0.100  1.0
  O  O7  1  0.700  0.866  0.922  1.0
  O  O8  1  0.500  0.244  0.477  1.0
  O  O9  1  0.271  0.145  0.061  1.0
  O  O10  1  0.738  0.317  0.873  1.0
  O  O11  1  0.462  0.782  0.527  1.0
  O  O12  1  0.878  0.456  0.300  1.0
  O  O13  1  0.929  0.955  0.339  1.0
[/CIF]
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