The compound described by CsU(SeO4)2 crystallizes in the monoclinic P2_1/c space group. Cs(1) is bonded in a 10-coordinate geometry to one O(1), one O(3), one O(4), one O(5), one O(6), one O(7), two equivalent O(2), and two equivalent O(8) atoms. U(1) is bonded in a distorted pentagonal bipyramidal geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), and one O(7) atom. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a trigonal non-coplanar geometry to one O(4), one O(6), and one O(8) atom. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(3), one O(5), and one O(7) atom. There are eight inequivalent O sites. In the first O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one U(1), and one Se(2) atom. In the second O site, O(6) is bonded in a 1-coordinate geometry to one Cs(1), one U(1), and one Se(1) atom. In the third O site, O(7) is bonded in a 2-coordinate geometry to one Cs(1), one U(1), and one Se(2) atom. In the fourth O site, O(8) is bonded in a distorted single-bond geometry to two equivalent Cs(1) and one Se(1) atom. In the fifth O site, O(1) is bonded in a single-bond geometry to one Cs(1) and one U(1) atom. In the sixth O site, O(2) is bonded in a single-bond geometry to two equivalent Cs(1) and one U(1) atom. In the seventh O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one U(1), and one Se(2) atom. In the eighth O site, O(4) is bonded in a distorted trigonal planar geometry to one Cs(1), one U(1), and one Se(1) atom. is represented by the CIF file [CIF]
data_CsU(SeO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.403
_cell_length_b   8.887
_cell_length_c   13.721
_cell_angle_alpha   50.886
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   984.228
_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
  Cs  Cs0  1  0.449  0.429  0.714  1.0
  Cs  Cs1  1  0.051  0.429  0.214  1.0
  Cs  Cs2  1  0.551  0.571  0.286  1.0
  Cs  Cs3  1  0.949  0.571  0.786  1.0
  U  U4  1  0.208  0.075  0.122  1.0
  U  U5  1  0.292  0.075  0.622  1.0
  U  U6  1  0.792  0.925  0.878  1.0
  U  U7  1  0.708  0.925  0.378  1.0
  Se  Se8  1  0.549  0.253  0.057  1.0
  Se  Se9  1  0.951  0.253  0.557  1.0
  Se  Se10  1  0.451  0.747  0.943  1.0
  Se  Se11  1  0.049  0.747  0.443  1.0
  Se  Se12  1  0.873  0.979  0.118  1.0
  Se  Se13  1  0.627  0.979  0.618  1.0
  Se  Se14  1  0.127  0.021  0.882  1.0
  Se  Se15  1  0.373  0.021  0.382  1.0
  O  O16  1  0.293  0.844  0.209  1.0
  O  O17  1  0.207  0.844  0.709  1.0
  O  O18  1  0.707  0.156  0.791  1.0
  O  O19  1  0.793  0.156  0.291  1.0
  O  O20  1  0.114  0.297  0.047  1.0
  O  O21  1  0.386  0.297  0.547  1.0
  O  O22  1  0.886  0.703  0.953  1.0
  O  O23  1  0.614  0.703  0.453  1.0
  O  O24  1  0.324  0.159  0.227  1.0
  O  O25  1  0.176  0.159  0.727  1.0
  O  O26  1  0.676  0.841  0.773  1.0
  O  O27  1  0.824  0.841  0.273  1.0
  O  O28  1  0.407  0.239  0.000  1.0
  O  O29  1  0.093  0.239  0.500  1.0
  O  O30  1  0.593  0.761  1.000  1.0
  O  O31  1  0.907  0.761  0.500  1.0
  O  O32  1  0.031  0.897  0.141  1.0
  O  O33  1  0.469  0.897  0.641  1.0
  O  O34  1  0.969  0.103  0.859  1.0
  O  O35  1  0.531  0.103  0.359  1.0
  O  O36  1  0.091  0.974  0.314  1.0
  O  O37  1  0.409  0.974  0.814  1.0
  O  O38  1  0.909  0.026  0.686  1.0
  O  O39  1  0.591  0.026  0.186  1.0
  O  O40  1  0.200  0.145  0.926  1.0
  O  O41  1  0.300  0.145  0.426  1.0
  O  O42  1  0.800  0.855  0.074  1.0
  O  O43  1  0.700  0.855  0.574  1.0
  O  O44  1  0.660  0.343  0.945  1.0
  O  O45  1  0.840  0.343  0.445  1.0
  O  O46  1  0.340  0.657  0.055  1.0
  O  O47  1  0.160  0.657  0.555  1.0
[/CIF]
.
The compound described by CsU(SeO4)2 crystallizes in the monoclinic P2_1/c space group. Cs(1) is bonded in a 10-coordinate geometry to one O(1), one O(3), one O(4), one O(5), one O(6), one O(7), two equivalent O(2), and two equivalent O(8) atoms. U(1) is bonded in a distorted pentagonal bipyramidal geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), and one O(7) atom. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a trigonal non-coplanar geometry to one O(4), one O(6), and one O(8) atom. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(3), one O(5), and one O(7) atom. There are eight inequivalent O sites. In the first O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one U(1), and one Se(2) atom. In the second O site, O(6) is bonded in a 1-coordinate geometry to one Cs(1), one U(1), and one Se(1) atom. In the third O site, O(7) is bonded in a 2-coordinate geometry to one Cs(1), one U(1), and one Se(2) atom. In the fourth O site, O(8) is bonded in a distorted single-bond geometry to two equivalent Cs(1) and one Se(1) atom. In the fifth O site, O(1) is bonded in a single-bond geometry to one Cs(1) and one U(1) atom. In the sixth O site, O(2) is bonded in a single-bond geometry to two equivalent Cs(1) and one U(1) atom. In the seventh O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Cs(1), one U(1), and one Se(2) atom. In the eighth O site, O(4) is bonded in a distorted trigonal planar geometry to one Cs(1), one U(1), and one Se(1) atom. is represented by the CIF file [CIF]
data_CsU(SeO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.403
_cell_length_b   8.887
_cell_length_c   13.721
_cell_angle_alpha   50.886
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   984.228
_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
  Cs  Cs0  1  0.449  0.429  0.714  1.0
  Cs  Cs1  1  0.051  0.429  0.214  1.0
  Cs  Cs2  1  0.551  0.571  0.286  1.0
  Cs  Cs3  1  0.949  0.571  0.786  1.0
  U  U4  1  0.208  0.075  0.122  1.0
  U  U5  1  0.292  0.075  0.622  1.0
  U  U6  1  0.792  0.925  0.878  1.0
  U  U7  1  0.708  0.925  0.378  1.0
  Se  Se8  1  0.549  0.253  0.057  1.0
  Se  Se9  1  0.951  0.253  0.557  1.0
  Se  Se10  1  0.451  0.747  0.943  1.0
  Se  Se11  1  0.049  0.747  0.443  1.0
  Se  Se12  1  0.873  0.979  0.118  1.0
  Se  Se13  1  0.627  0.979  0.618  1.0
  Se  Se14  1  0.127  0.021  0.882  1.0
  Se  Se15  1  0.373  0.021  0.382  1.0
  O  O16  1  0.293  0.844  0.209  1.0
  O  O17  1  0.207  0.844  0.709  1.0
  O  O18  1  0.707  0.156  0.791  1.0
  O  O19  1  0.793  0.156  0.291  1.0
  O  O20  1  0.114  0.297  0.047  1.0
  O  O21  1  0.386  0.297  0.547  1.0
  O  O22  1  0.886  0.703  0.953  1.0
  O  O23  1  0.614  0.703  0.453  1.0
  O  O24  1  0.324  0.159  0.227  1.0
  O  O25  1  0.176  0.159  0.727  1.0
  O  O26  1  0.676  0.841  0.773  1.0
  O  O27  1  0.824  0.841  0.273  1.0
  O  O28  1  0.407  0.239  0.000  1.0
  O  O29  1  0.093  0.239  0.500  1.0
  O  O30  1  0.593  0.761  1.000  1.0
  O  O31  1  0.907  0.761  0.500  1.0
  O  O32  1  0.031  0.897  0.141  1.0
  O  O33  1  0.469  0.897  0.641  1.0
  O  O34  1  0.969  0.103  0.859  1.0
  O  O35  1  0.531  0.103  0.359  1.0
  O  O36  1  0.091  0.974  0.314  1.0
  O  O37  1  0.409  0.974  0.814  1.0
  O  O38  1  0.909  0.026  0.686  1.0
  O  O39  1  0.591  0.026  0.186  1.0
  O  O40  1  0.200  0.145  0.926  1.0
  O  O41  1  0.300  0.145  0.426  1.0
  O  O42  1  0.800  0.855  0.074  1.0
  O  O43  1  0.700  0.855  0.574  1.0
  O  O44  1  0.660  0.343  0.945  1.0
  O  O45  1  0.840  0.343  0.445  1.0
  O  O46  1  0.340  0.657  0.055  1.0
  O  O47  1  0.160  0.657  0.555  1.0
[/CIF]
.