The compound described by KUSeO8 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 9-coordinate geometry to one O(2), two equivalent O(1), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. U(1) is bonded to one O(1), one O(2), one O(5), one O(7), one O(8), and two equivalent O(6) atoms to form distorted UO7 pentagonal bipyramids that share corners with two equivalent U(1)O7 pentagonal bipyramids and corners with two equivalent Se(1)O4 tetrahedra. Se(1) is bonded to one O(1), one O(3), one O(4), and one O(7) atom to form SeO4 tetrahedra that share corners with two equivalent U(1)O7 pentagonal bipyramids. There are eight inequivalent O sites. In the first O site, O(6) is bonded in a bent 150 degrees geometry to two equivalent U(1) atoms. In the second O site, O(7) is bonded in a bent 150 degrees geometry to one U(1) and one Se(1) atom. In the third O site, O(8) is bonded in a single-bond geometry to one U(1) atom. In the fourth O site, O(1) is bonded in a 2-coordinate geometry to two equivalent K(1), one U(1), and one Se(1) atom. In the fifth O site, O(2) is bonded in a distorted single-bond geometry to one K(1) and one U(1) atom. In the sixth O site, O(3) is bonded in a 3-coordinate geometry to two equivalent K(1) and one Se(1) atom. In the seventh O site, O(4) is bonded in a 3-coordinate geometry to two equivalent K(1) and one Se(1) atom. In the eighth O site, O(5) is bonded in a distorted single-bond geometry to two equivalent K(1) and one U(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_KUSeO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.261
_cell_length_b   8.472
_cell_length_c   11.700
_cell_angle_alpha   70.860
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   773.566
_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
  K  K0  1  0.536  0.440  0.795  1.0
  K  K1  1  0.036  0.560  0.705  1.0
  K  K2  1  0.464  0.560  0.205  1.0
  K  K3  1  0.964  0.440  0.295  1.0
  U  U4  1  0.096  0.930  0.294  1.0
  U  U5  1  0.596  0.070  0.206  1.0
  U  U6  1  0.904  0.070  0.706  1.0
  U  U7  1  0.404  0.930  0.794  1.0
  Se  Se8  1  0.238  0.308  0.037  1.0
  Se  Se9  1  0.738  0.692  0.463  1.0
  Se  Se10  1  0.762  0.692  0.963  1.0
  Se  Se11  1  0.262  0.308  0.537  1.0
  O  O12  1  0.441  0.281  0.066  1.0
  O  O13  1  0.941  0.719  0.434  1.0
  O  O14  1  0.559  0.719  0.934  1.0
  O  O15  1  0.059  0.281  0.566  1.0
  O  O16  1  0.027  0.092  0.353  1.0
  O  O17  1  0.527  0.908  0.147  1.0
  O  O18  1  0.973  0.908  0.647  1.0
  O  O19  1  0.473  0.092  0.853  1.0
  O  O20  1  0.213  0.363  0.890  1.0
  O  O21  1  0.713  0.637  0.610  1.0
  O  O22  1  0.787  0.637  0.110  1.0
  O  O23  1  0.287  0.363  0.390  1.0
  O  O24  1  0.172  0.443  0.100  1.0
  O  O25  1  0.672  0.557  0.400  1.0
  O  O26  1  0.828  0.557  0.900  1.0
  O  O27  1  0.328  0.443  0.600  1.0
  O  O28  1  0.181  0.753  0.255  1.0
  O  O29  1  0.681  0.247  0.245  1.0
  O  O30  1  0.819  0.247  0.745  1.0
  O  O31  1  0.319  0.753  0.755  1.0
  O  O32  1  0.856  0.965  0.203  1.0
  O  O33  1  0.356  0.035  0.297  1.0
  O  O34  1  0.144  0.035  0.797  1.0
  O  O35  1  0.644  0.965  0.703  1.0
  O  O36  1  0.152  0.116  0.103  1.0
  O  O37  1  0.652  0.884  0.397  1.0
  O  O38  1  0.848  0.884  0.897  1.0
  O  O39  1  0.348  0.116  0.603  1.0
  O  O40  1  0.278  0.827  0.447  1.0
  O  O41  1  0.778  0.173  0.053  1.0
  O  O42  1  0.722  0.173  0.553  1.0
  O  O43  1  0.222  0.827  0.947  1.0
[/CIF]
.
The compound described by KUSeO8 crystallizes in the monoclinic P2_1/c space group. K(1) is bonded in a 9-coordinate geometry to one O(2), two equivalent O(1), two equivalent O(3), two equivalent O(4), and two equivalent O(5) atoms. U(1) is bonded to one O(1), one O(2), one O(5), one O(7), one O(8), and two equivalent O(6) atoms to form distorted UO7 pentagonal bipyramids that share corners with two equivalent U(1)O7 pentagonal bipyramids and corners with two equivalent Se(1)O4 tetrahedra. Se(1) is bonded to one O(1), one O(3), one O(4), and one O(7) atom to form SeO4 tetrahedra that share corners with two equivalent U(1)O7 pentagonal bipyramids. There are eight inequivalent O sites. In the first O site, O(6) is bonded in a bent 150 degrees geometry to two equivalent U(1) atoms. In the second O site, O(7) is bonded in a bent 150 degrees geometry to one U(1) and one Se(1) atom. In the third O site, O(8) is bonded in a single-bond geometry to one U(1) atom. In the fourth O site, O(1) is bonded in a 2-coordinate geometry to two equivalent K(1), one U(1), and one Se(1) atom. In the fifth O site, O(2) is bonded in a distorted single-bond geometry to one K(1) and one U(1) atom. In the sixth O site, O(3) is bonded in a 3-coordinate geometry to two equivalent K(1) and one Se(1) atom. In the seventh O site, O(4) is bonded in a 3-coordinate geometry to two equivalent K(1) and one Se(1) atom. In the eighth O site, O(5) is bonded in a distorted single-bond geometry to two equivalent K(1) and one U(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_KUSeO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.261
_cell_length_b   8.472
_cell_length_c   11.700
_cell_angle_alpha   70.860
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   773.566
_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
  K  K0  1  0.536  0.440  0.795  1.0
  K  K1  1  0.036  0.560  0.705  1.0
  K  K2  1  0.464  0.560  0.205  1.0
  K  K3  1  0.964  0.440  0.295  1.0
  U  U4  1  0.096  0.930  0.294  1.0
  U  U5  1  0.596  0.070  0.206  1.0
  U  U6  1  0.904  0.070  0.706  1.0
  U  U7  1  0.404  0.930  0.794  1.0
  Se  Se8  1  0.238  0.308  0.037  1.0
  Se  Se9  1  0.738  0.692  0.463  1.0
  Se  Se10  1  0.762  0.692  0.963  1.0
  Se  Se11  1  0.262  0.308  0.537  1.0
  O  O12  1  0.441  0.281  0.066  1.0
  O  O13  1  0.941  0.719  0.434  1.0
  O  O14  1  0.559  0.719  0.934  1.0
  O  O15  1  0.059  0.281  0.566  1.0
  O  O16  1  0.027  0.092  0.353  1.0
  O  O17  1  0.527  0.908  0.147  1.0
  O  O18  1  0.973  0.908  0.647  1.0
  O  O19  1  0.473  0.092  0.853  1.0
  O  O20  1  0.213  0.363  0.890  1.0
  O  O21  1  0.713  0.637  0.610  1.0
  O  O22  1  0.787  0.637  0.110  1.0
  O  O23  1  0.287  0.363  0.390  1.0
  O  O24  1  0.172  0.443  0.100  1.0
  O  O25  1  0.672  0.557  0.400  1.0
  O  O26  1  0.828  0.557  0.900  1.0
  O  O27  1  0.328  0.443  0.600  1.0
  O  O28  1  0.181  0.753  0.255  1.0
  O  O29  1  0.681  0.247  0.245  1.0
  O  O30  1  0.819  0.247  0.745  1.0
  O  O31  1  0.319  0.753  0.755  1.0
  O  O32  1  0.856  0.965  0.203  1.0
  O  O33  1  0.356  0.035  0.297  1.0
  O  O34  1  0.144  0.035  0.797  1.0
  O  O35  1  0.644  0.965  0.703  1.0
  O  O36  1  0.152  0.116  0.103  1.0
  O  O37  1  0.652  0.884  0.397  1.0
  O  O38  1  0.848  0.884  0.897  1.0
  O  O39  1  0.348  0.116  0.603  1.0
  O  O40  1  0.278  0.827  0.447  1.0
  O  O41  1  0.778  0.173  0.053  1.0
  O  O42  1  0.722  0.173  0.553  1.0
  O  O43  1  0.222  0.827  0.947  1.0
[/CIF]
.