The compound described by BaU3W3(SeO7)2 crystallizes in the orthorhombic Pmn2_1 space group. Ba(1) is bonded in a 6-coordinate geometry to one O(2), one O(8), two equivalent O(3), and two equivalent O(5) atoms. There are two inequivalent U sites. In the first U site, U(1) is bonded to one O(2), one O(4), one O(6), one O(8), two equivalent O(1), and two equivalent O(9) atoms to form distorted edge-sharing UO8 hexagonal bipyramids. In the second U site, U(2) is bonded to one O(1), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(9) atom to form distorted UO7 pentagonal bipyramids that share edges with two equivalent U(1)O8 hexagonal bipyramids and  an edgeedge with one U(2)O7 pentagonal bipyramid. There are two inequivalent W sites. In the first W site, W(1) is bonded in a single-bond geometry to one O(7) atom. In the second W site, W(2) is bonded in a bent 120 degrees geometry to one O(2) and one O(8) atom. Se(1) is bonded in a trigonal non-coplanar geometry to one O(1), one O(7), and one O(9) atom. There are nine inequivalent O sites. In the first O site, O(6) is bonded in a trigonal planar geometry to one U(1) and two equivalent U(2) atoms. In the second O site, O(7) is bonded in a trigonal planar geometry to one U(2), one W(1), and one Se(1) atom. In the third O site, O(8) is bonded in a 3-coordinate geometry to one Ba(1), one U(1), and one W(2) atom. In the fourth O site, O(9) is bonded in a 3-coordinate geometry to one U(1), one U(2), and one Se(1) atom. In the fifth O site, O(1) is bonded in a 3-coordinate geometry to one U(1), one U(2), and one Se(1) atom. In the sixth O site, O(2) is bonded in a 3-coordinate geometry to one Ba(1), one U(1), and one W(2) atom. In the seventh O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Ba(1) and one U(2) atom. In the eighth O site, O(4) is bonded in a distorted trigonal planar geometry to one U(1) and two equivalent U(2) atoms. In the ninth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Ba(1) and one U(2) atom. is represented by the CIF file [CIF]
data_BaU3W3(SeO7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.170
_cell_length_b   7.473
_cell_length_c   17.219
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   922.637
_cell_formula_units_Z   2
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
  Ba  Ba0  1  0.330  0.426  0.000  1.0
  Ba  Ba1  1  0.830  0.574  0.500  1.0
  U  U2  1  0.972  0.890  0.000  1.0
  U  U3  1  0.472  0.110  0.500  1.0
  U  U4  1  0.472  0.899  0.895  1.0
  U  U5  1  0.972  0.101  0.605  1.0
  U  U6  1  0.972  0.101  0.395  1.0
  U  U7  1  0.472  0.899  0.105  1.0
  W  W8  1  0.565  0.637  0.707  1.0
  W  W9  1  0.065  0.363  0.793  1.0
  W  W10  1  0.065  0.363  0.207  1.0
  W  W11  1  0.565  0.637  0.293  1.0
  W  W12  1  0.840  0.377  0.000  1.0
  W  W13  1  0.340  0.623  0.500  1.0
  Se  Se14  1  0.966  0.879  0.795  1.0
  Se  Se15  1  0.466  0.121  0.705  1.0
  Se  Se16  1  0.466  0.121  0.295  1.0
  Se  Se17  1  0.966  0.879  0.205  1.0
  O  O18  1  0.147  0.869  0.860  1.0
  O  O19  1  0.647  0.131  0.640  1.0
  O  O20  1  0.647  0.131  0.360  1.0
  O  O21  1  0.147  0.869  0.140  1.0
  O  O22  1  0.953  0.617  0.000  1.0
  O  O23  1  0.453  0.383  0.500  1.0
  O  O24  1  0.495  0.646  0.889  1.0
  O  O25  1  0.995  0.354  0.611  1.0
  O  O26  1  0.995  0.354  0.389  1.0
  O  O27  1  0.495  0.646  0.111  1.0
  O  O28  1  0.283  0.853  0.000  1.0
  O  O29  1  0.783  0.147  0.500  1.0
  O  O30  1  0.940  0.849  0.601  1.0
  O  O31  1  0.440  0.151  0.899  1.0
  O  O32  1  0.440  0.151  0.101  1.0
  O  O33  1  0.940  0.849  0.399  1.0
  O  O34  1  0.664  0.908  0.000  1.0
  O  O35  1  0.164  0.092  0.500  1.0
  O  O36  1  0.496  0.908  0.751  1.0
  O  O37  1  0.996  0.092  0.749  1.0
  O  O38  1  0.996  0.092  0.251  1.0
  O  O39  1  0.496  0.908  0.249  1.0
  O  O40  1  0.004  0.163  0.000  1.0
  O  O41  1  0.504  0.837  0.500  1.0
  O  O42  1  0.807  0.929  0.866  1.0
  O  O43  1  0.307  0.071  0.634  1.0
  O  O44  1  0.307  0.071  0.366  1.0
  O  O45  1  0.807  0.929  0.134  1.0
[/CIF]
.
The compound described by BaU3W3(SeO7)2 crystallizes in the orthorhombic Pmn2_1 space group. Ba(1) is bonded in a 6-coordinate geometry to one O(2), one O(8), two equivalent O(3), and two equivalent O(5) atoms. There are two inequivalent U sites. In the first U site, U(1) is bonded to one O(2), one O(4), one O(6), one O(8), two equivalent O(1), and two equivalent O(9) atoms to form distorted edge-sharing UO8 hexagonal bipyramids. In the second U site, U(2) is bonded to one O(1), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(9) atom to form distorted UO7 pentagonal bipyramids that share edges with two equivalent U(1)O8 hexagonal bipyramids and  an edgeedge with one U(2)O7 pentagonal bipyramid. There are two inequivalent W sites. In the first W site, W(1) is bonded in a single-bond geometry to one O(7) atom. In the second W site, W(2) is bonded in a bent 120 degrees geometry to one O(2) and one O(8) atom. Se(1) is bonded in a trigonal non-coplanar geometry to one O(1), one O(7), and one O(9) atom. There are nine inequivalent O sites. In the first O site, O(6) is bonded in a trigonal planar geometry to one U(1) and two equivalent U(2) atoms. In the second O site, O(7) is bonded in a trigonal planar geometry to one U(2), one W(1), and one Se(1) atom. In the third O site, O(8) is bonded in a 3-coordinate geometry to one Ba(1), one U(1), and one W(2) atom. In the fourth O site, O(9) is bonded in a 3-coordinate geometry to one U(1), one U(2), and one Se(1) atom. In the fifth O site, O(1) is bonded in a 3-coordinate geometry to one U(1), one U(2), and one Se(1) atom. In the sixth O site, O(2) is bonded in a 3-coordinate geometry to one Ba(1), one U(1), and one W(2) atom. In the seventh O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Ba(1) and one U(2) atom. In the eighth O site, O(4) is bonded in a distorted trigonal planar geometry to one U(1) and two equivalent U(2) atoms. In the ninth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Ba(1) and one U(2) atom. is represented by the CIF file [CIF]
data_BaU3W3(SeO7)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.170
_cell_length_b   7.473
_cell_length_c   17.219
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   922.637
_cell_formula_units_Z   2
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
  Ba  Ba0  1  0.330  0.426  0.000  1.0
  Ba  Ba1  1  0.830  0.574  0.500  1.0
  U  U2  1  0.972  0.890  0.000  1.0
  U  U3  1  0.472  0.110  0.500  1.0
  U  U4  1  0.472  0.899  0.895  1.0
  U  U5  1  0.972  0.101  0.605  1.0
  U  U6  1  0.972  0.101  0.395  1.0
  U  U7  1  0.472  0.899  0.105  1.0
  W  W8  1  0.565  0.637  0.707  1.0
  W  W9  1  0.065  0.363  0.793  1.0
  W  W10  1  0.065  0.363  0.207  1.0
  W  W11  1  0.565  0.637  0.293  1.0
  W  W12  1  0.840  0.377  0.000  1.0
  W  W13  1  0.340  0.623  0.500  1.0
  Se  Se14  1  0.966  0.879  0.795  1.0
  Se  Se15  1  0.466  0.121  0.705  1.0
  Se  Se16  1  0.466  0.121  0.295  1.0
  Se  Se17  1  0.966  0.879  0.205  1.0
  O  O18  1  0.147  0.869  0.860  1.0
  O  O19  1  0.647  0.131  0.640  1.0
  O  O20  1  0.647  0.131  0.360  1.0
  O  O21  1  0.147  0.869  0.140  1.0
  O  O22  1  0.953  0.617  0.000  1.0
  O  O23  1  0.453  0.383  0.500  1.0
  O  O24  1  0.495  0.646  0.889  1.0
  O  O25  1  0.995  0.354  0.611  1.0
  O  O26  1  0.995  0.354  0.389  1.0
  O  O27  1  0.495  0.646  0.111  1.0
  O  O28  1  0.283  0.853  0.000  1.0
  O  O29  1  0.783  0.147  0.500  1.0
  O  O30  1  0.940  0.849  0.601  1.0
  O  O31  1  0.440  0.151  0.899  1.0
  O  O32  1  0.440  0.151  0.101  1.0
  O  O33  1  0.940  0.849  0.399  1.0
  O  O34  1  0.664  0.908  0.000  1.0
  O  O35  1  0.164  0.092  0.500  1.0
  O  O36  1  0.496  0.908  0.751  1.0
  O  O37  1  0.996  0.092  0.749  1.0
  O  O38  1  0.996  0.092  0.251  1.0
  O  O39  1  0.496  0.908  0.249  1.0
  O  O40  1  0.004  0.163  0.000  1.0
  O  O41  1  0.504  0.837  0.500  1.0
  O  O42  1  0.807  0.929  0.866  1.0
  O  O43  1  0.307  0.071  0.634  1.0
  O  O44  1  0.307  0.071  0.366  1.0
  O  O45  1  0.807  0.929  0.134  1.0
[/CIF]
.