The compound described by UH2Se2O9 crystallizes in the monoclinic C2/c space group. U(1) is bonded to one O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms to form distorted UO7 pentagonal bipyramids that share corners with four equivalent Se(1)O4 tetrahedra. H(1) is bonded in a single-bond geometry to one O(1) atom. Se(1) is bonded to one O(2), one O(5), and two equivalent O(4) atoms to form distorted SeO4 tetrahedra that share corners with two equivalent U(1)O7 pentagonal bipyramids and corners with two equivalent Se(1)O4 tetrahedra. There are five inequivalent O sites. In the first O site, O(5) is bonded in a 2-coordinate geometry to one U(1) and one Se(1) atom. In the second O site, O(1) is bonded in a water-like geometry to one U(1) and two equivalent H(1) atoms. In the third O site, O(2) is bonded in a linear geometry to one U(1) and one Se(1) atom. In the fourth O site, O(3) is bonded in a single-bond geometry to one U(1) atom. In the fifth O site, O(4) is bonded in a distorted bent 120 degrees geometry to two equivalent Se(1) atoms. is represented by the CIF file [CIF]
data_UH2Se2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.418
_cell_length_b   8.418
_cell_length_c   5.950
_cell_angle_alpha   87.999
_cell_angle_beta   87.999
_cell_angle_gamma   100.788
_symmetry_Int_Tables_number   1
_cell_volume   413.553
_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
  U  U0  1  0.693  0.307  0.250  1.0
  U  U1  1  0.307  0.693  0.750  1.0
  H  H2  1  0.519  0.601  0.162  1.0
  H  H3  1  0.601  0.519  0.662  1.0
  H  H4  1  0.481  0.399  0.838  1.0
  H  H5  1  0.399  0.481  0.338  1.0
  Se  Se6  1  0.267  0.103  0.049  1.0
  Se  Se7  1  0.103  0.267  0.549  1.0
  Se  Se8  1  0.733  0.897  0.951  1.0
  Se  Se9  1  0.897  0.733  0.451  1.0
  O  O10  1  0.504  0.496  0.250  1.0
  O  O11  1  0.496  0.504  0.750  1.0
  O  O12  1  0.728  0.066  0.094  1.0
  O  O13  1  0.066  0.728  0.594  1.0
  O  O14  1  0.272  0.934  0.906  1.0
  O  O15  1  0.934  0.272  0.406  1.0
  O  O16  1  0.585  0.209  0.499  1.0
  O  O17  1  0.209  0.585  0.999  1.0
  O  O18  1  0.415  0.791  0.501  1.0
  O  O19  1  0.791  0.415  0.001  1.0
  O  O20  1  0.130  0.198  0.925  1.0
  O  O21  1  0.198  0.130  0.425  1.0
  O  O22  1  0.870  0.802  0.075  1.0
  O  O23  1  0.802  0.870  0.575  1.0
  O  O24  1  0.456  0.216  0.016  1.0
  O  O25  1  0.216  0.456  0.516  1.0
  O  O26  1  0.544  0.784  0.984  1.0
  O  O27  1  0.784  0.544  0.484  1.0
[/CIF]
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The compound described by UH2Se2O9 crystallizes in the monoclinic C2/c space group. U(1) is bonded to one O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms to form distorted UO7 pentagonal bipyramids that share corners with four equivalent Se(1)O4 tetrahedra. H(1) is bonded in a single-bond geometry to one O(1) atom. Se(1) is bonded to one O(2), one O(5), and two equivalent O(4) atoms to form distorted SeO4 tetrahedra that share corners with two equivalent U(1)O7 pentagonal bipyramids and corners with two equivalent Se(1)O4 tetrahedra. There are five inequivalent O sites. In the first O site, O(5) is bonded in a 2-coordinate geometry to one U(1) and one Se(1) atom. In the second O site, O(1) is bonded in a water-like geometry to one U(1) and two equivalent H(1) atoms. In the third O site, O(2) is bonded in a linear geometry to one U(1) and one Se(1) atom. In the fourth O site, O(3) is bonded in a single-bond geometry to one U(1) atom. In the fifth O site, O(4) is bonded in a distorted bent 120 degrees geometry to two equivalent Se(1) atoms. is represented by the CIF file [CIF]
data_UH2Se2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.418
_cell_length_b   8.418
_cell_length_c   5.950
_cell_angle_alpha   87.999
_cell_angle_beta   87.999
_cell_angle_gamma   100.788
_symmetry_Int_Tables_number   1
_cell_volume   413.553
_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
  U  U0  1  0.693  0.307  0.250  1.0
  U  U1  1  0.307  0.693  0.750  1.0
  H  H2  1  0.519  0.601  0.162  1.0
  H  H3  1  0.601  0.519  0.662  1.0
  H  H4  1  0.481  0.399  0.838  1.0
  H  H5  1  0.399  0.481  0.338  1.0
  Se  Se6  1  0.267  0.103  0.049  1.0
  Se  Se7  1  0.103  0.267  0.549  1.0
  Se  Se8  1  0.733  0.897  0.951  1.0
  Se  Se9  1  0.897  0.733  0.451  1.0
  O  O10  1  0.504  0.496  0.250  1.0
  O  O11  1  0.496  0.504  0.750  1.0
  O  O12  1  0.728  0.066  0.094  1.0
  O  O13  1  0.066  0.728  0.594  1.0
  O  O14  1  0.272  0.934  0.906  1.0
  O  O15  1  0.934  0.272  0.406  1.0
  O  O16  1  0.585  0.209  0.499  1.0
  O  O17  1  0.209  0.585  0.999  1.0
  O  O18  1  0.415  0.791  0.501  1.0
  O  O19  1  0.791  0.415  0.001  1.0
  O  O20  1  0.130  0.198  0.925  1.0
  O  O21  1  0.198  0.130  0.425  1.0
  O  O22  1  0.870  0.802  0.075  1.0
  O  O23  1  0.802  0.870  0.575  1.0
  O  O24  1  0.456  0.216  0.016  1.0
  O  O25  1  0.216  0.456  0.516  1.0
  O  O26  1  0.544  0.784  0.984  1.0
  O  O27  1  0.784  0.544  0.484  1.0
[/CIF]
.