The material structure described by Ce3As2O7Cl crystallizes in the tetragonal P4_2nm space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the second Ce site, Ce(2) is bonded in a 8-coordinate geometry to one O(2), two equivalent O(1), two equivalent O(3), two equivalent O(4), and one Cl(1) atom. As(1) is bonded in a distorted T-shaped geometry to one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(3) is bonded to one Ce(1), two equivalent Ce(2), and one As(1) atom to form distorted OCe3As trigonal pyramids that share corners with two equivalent O(1)Ce4 tetrahedra, corners with three equivalent O(4)Ce3As tetrahedra, corners with three equivalent O(3)Ce3As trigonal pyramids,  an edgeedge with one O(1)Ce4 tetrahedra, and edges with two equivalent O(4)Ce3As tetrahedra. In the second O site, O(4) is bonded to one Ce(1), two equivalent Ce(2), and one As(1) atom to form distorted OCe3As tetrahedra that share corners with two equivalent O(1)Ce4 tetrahedra, corners with three equivalent O(4)Ce3As tetrahedra, corners with three equivalent O(3)Ce3As trigonal pyramids,  an edgeedge with one O(1)Ce4 tetrahedra, and edges with two equivalent O(3)Ce3As trigonal pyramids. In the third O site, O(1) is bonded to four equivalent Ce(2) atoms to form OCe4 tetrahedra that share corners with four equivalent O(4)Ce3As tetrahedra, corners with four equivalent O(3)Ce3As trigonal pyramids, edges with two equivalent O(4)Ce3As tetrahedra, edges with two equivalent O(1)Ce4 tetrahedra, and edges with two equivalent O(3)Ce3As trigonal pyramids. In the fourth O site, O(2) is bonded in a 3-coordinate geometry to one Ce(1), one Ce(2), and one As(1) atom. Cl(1) is bonded in a 2-coordinate geometry to two equivalent Ce(2) atoms. is represented by the CIF card [CIF]
data_Ce3As2ClO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.621
_cell_length_b   12.917
_cell_length_c   12.917
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   937.860
_cell_formula_units_Z   4
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  0.501  0.228  0.772  1.0
  Ce  Ce1  1  0.501  0.772  0.228  1.0
  Ce  Ce2  1  0.001  0.728  0.728  1.0
  Ce  Ce3  1  0.001  0.272  0.272  1.0
  Ce  Ce4  1  0.529  0.947  0.636  1.0
  Ce  Ce5  1  0.529  0.053  0.364  1.0
  Ce  Ce6  1  0.029  0.447  0.864  1.0
  Ce  Ce7  1  0.029  0.553  0.136  1.0
  Ce  Ce8  1  0.529  0.364  0.053  1.0
  Ce  Ce9  1  0.529  0.636  0.947  1.0
  Ce  Ce10  1  0.029  0.864  0.447  1.0
  Ce  Ce11  1  0.029  0.136  0.553  1.0
  As  As12  1  0.497  0.294  0.482  1.0
  As  As13  1  0.497  0.706  0.518  1.0
  As  As14  1  0.997  0.794  0.018  1.0
  As  As15  1  0.997  0.206  0.982  1.0
  As  As16  1  0.497  0.518  0.706  1.0
  As  As17  1  0.497  0.482  0.294  1.0
  As  As18  1  0.997  0.018  0.794  1.0
  As  As19  1  0.997  0.982  0.206  1.0
  Cl  Cl20  1  0.963  0.335  0.665  1.0
  Cl  Cl21  1  0.963  0.665  0.335  1.0
  Cl  Cl22  1  0.463  0.835  0.835  1.0
  Cl  Cl23  1  0.463  0.165  0.165  1.0
  O  O24  1  0.772  0.000  0.500  1.0
  O  O25  1  0.272  0.500  0.000  1.0
  O  O26  1  0.772  0.500  0.000  1.0
  O  O27  1  0.272  0.000  0.500  1.0
  O  O28  1  0.459  0.212  0.593  1.0
  O  O29  1  0.459  0.788  0.407  1.0
  O  O30  1  0.959  0.712  0.907  1.0
  O  O31  1  0.959  0.288  0.093  1.0
  O  O32  1  0.459  0.407  0.788  1.0
  O  O33  1  0.459  0.593  0.212  1.0
  O  O34  1  0.959  0.907  0.712  1.0
  O  O35  1  0.959  0.093  0.288  1.0
  O  O36  1  0.746  0.225  0.423  1.0
  O  O37  1  0.746  0.775  0.577  1.0
  O  O38  1  0.246  0.725  0.077  1.0
  O  O39  1  0.246  0.275  0.923  1.0
  O  O40  1  0.746  0.577  0.775  1.0
  O  O41  1  0.746  0.423  0.225  1.0
  O  O42  1  0.246  0.077  0.725  1.0
  O  O43  1  0.246  0.923  0.275  1.0
  O  O44  1  0.269  0.777  0.590  1.0
  O  O45  1  0.269  0.223  0.410  1.0
  O  O46  1  0.769  0.277  0.910  1.0
  O  O47  1  0.769  0.723  0.090  1.0
  O  O48  1  0.269  0.410  0.223  1.0
  O  O49  1  0.269  0.590  0.777  1.0
  O  O50  1  0.769  0.910  0.277  1.0
  O  O51  1  0.769  0.090  0.723  1.0
[/CIF]
.
The material structure described by Ce3As2O7Cl crystallizes in the tetragonal P4_2nm space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 6-coordinate geometry to two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the second Ce site, Ce(2) is bonded in a 8-coordinate geometry to one O(2), two equivalent O(1), two equivalent O(3), two equivalent O(4), and one Cl(1) atom. As(1) is bonded in a distorted T-shaped geometry to one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(3) is bonded to one Ce(1), two equivalent Ce(2), and one As(1) atom to form distorted OCe3As trigonal pyramids that share corners with two equivalent O(1)Ce4 tetrahedra, corners with three equivalent O(4)Ce3As tetrahedra, corners with three equivalent O(3)Ce3As trigonal pyramids,  an edgeedge with one O(1)Ce4 tetrahedra, and edges with two equivalent O(4)Ce3As tetrahedra. In the second O site, O(4) is bonded to one Ce(1), two equivalent Ce(2), and one As(1) atom to form distorted OCe3As tetrahedra that share corners with two equivalent O(1)Ce4 tetrahedra, corners with three equivalent O(4)Ce3As tetrahedra, corners with three equivalent O(3)Ce3As trigonal pyramids,  an edgeedge with one O(1)Ce4 tetrahedra, and edges with two equivalent O(3)Ce3As trigonal pyramids. In the third O site, O(1) is bonded to four equivalent Ce(2) atoms to form OCe4 tetrahedra that share corners with four equivalent O(4)Ce3As tetrahedra, corners with four equivalent O(3)Ce3As trigonal pyramids, edges with two equivalent O(4)Ce3As tetrahedra, edges with two equivalent O(1)Ce4 tetrahedra, and edges with two equivalent O(3)Ce3As trigonal pyramids. In the fourth O site, O(2) is bonded in a 3-coordinate geometry to one Ce(1), one Ce(2), and one As(1) atom. Cl(1) is bonded in a 2-coordinate geometry to two equivalent Ce(2) atoms. is represented by the CIF card [CIF]
data_Ce3As2ClO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.621
_cell_length_b   12.917
_cell_length_c   12.917
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   937.860
_cell_formula_units_Z   4
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  0.501  0.228  0.772  1.0
  Ce  Ce1  1  0.501  0.772  0.228  1.0
  Ce  Ce2  1  0.001  0.728  0.728  1.0
  Ce  Ce3  1  0.001  0.272  0.272  1.0
  Ce  Ce4  1  0.529  0.947  0.636  1.0
  Ce  Ce5  1  0.529  0.053  0.364  1.0
  Ce  Ce6  1  0.029  0.447  0.864  1.0
  Ce  Ce7  1  0.029  0.553  0.136  1.0
  Ce  Ce8  1  0.529  0.364  0.053  1.0
  Ce  Ce9  1  0.529  0.636  0.947  1.0
  Ce  Ce10  1  0.029  0.864  0.447  1.0
  Ce  Ce11  1  0.029  0.136  0.553  1.0
  As  As12  1  0.497  0.294  0.482  1.0
  As  As13  1  0.497  0.706  0.518  1.0
  As  As14  1  0.997  0.794  0.018  1.0
  As  As15  1  0.997  0.206  0.982  1.0
  As  As16  1  0.497  0.518  0.706  1.0
  As  As17  1  0.497  0.482  0.294  1.0
  As  As18  1  0.997  0.018  0.794  1.0
  As  As19  1  0.997  0.982  0.206  1.0
  Cl  Cl20  1  0.963  0.335  0.665  1.0
  Cl  Cl21  1  0.963  0.665  0.335  1.0
  Cl  Cl22  1  0.463  0.835  0.835  1.0
  Cl  Cl23  1  0.463  0.165  0.165  1.0
  O  O24  1  0.772  0.000  0.500  1.0
  O  O25  1  0.272  0.500  0.000  1.0
  O  O26  1  0.772  0.500  0.000  1.0
  O  O27  1  0.272  0.000  0.500  1.0
  O  O28  1  0.459  0.212  0.593  1.0
  O  O29  1  0.459  0.788  0.407  1.0
  O  O30  1  0.959  0.712  0.907  1.0
  O  O31  1  0.959  0.288  0.093  1.0
  O  O32  1  0.459  0.407  0.788  1.0
  O  O33  1  0.459  0.593  0.212  1.0
  O  O34  1  0.959  0.907  0.712  1.0
  O  O35  1  0.959  0.093  0.288  1.0
  O  O36  1  0.746  0.225  0.423  1.0
  O  O37  1  0.746  0.775  0.577  1.0
  O  O38  1  0.246  0.725  0.077  1.0
  O  O39  1  0.246  0.275  0.923  1.0
  O  O40  1  0.746  0.577  0.775  1.0
  O  O41  1  0.746  0.423  0.225  1.0
  O  O42  1  0.246  0.077  0.725  1.0
  O  O43  1  0.246  0.923  0.275  1.0
  O  O44  1  0.269  0.777  0.590  1.0
  O  O45  1  0.269  0.223  0.410  1.0
  O  O46  1  0.769  0.277  0.910  1.0
  O  O47  1  0.769  0.723  0.090  1.0
  O  O48  1  0.269  0.410  0.223  1.0
  O  O49  1  0.269  0.590  0.777  1.0
  O  O50  1  0.769  0.910  0.277  1.0
  O  O51  1  0.769  0.090  0.723  1.0
[/CIF]
.