The compound described by U(O4I)2 crystallizes in the monoclinic P2_1/c space group. U(1) is bonded to two equivalent O(1), two equivalent O(2), and four equivalent O(3) atoms to form distorted edge-sharing UO8 hexagonal bipyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one U(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one U(1) and two equivalent I(1) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent U(1) and one I(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to two equivalent I(1) atoms. I(1) is bonded in a 3-coordinate geometry to one O(3), two equivalent O(2), and two equivalent O(4) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_U(IO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   16.294
_cell_length_b   4.206
_cell_length_c   5.720
_cell_angle_alpha   62.466
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   347.586
_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  0.500  0.500  0.000  1.0
  U  U1  1  0.000  0.500  0.500  1.0
  I  I2  1  0.663  0.891  0.293  1.0
  I  I3  1  0.163  0.109  0.207  1.0
  I  I4  1  0.337  0.109  0.707  1.0
  I  I5  1  0.837  0.891  0.793  1.0
  O  O6  1  0.441  0.316  0.302  1.0
  O  O7  1  0.941  0.684  0.198  1.0
  O  O8  1  0.559  0.684  0.698  1.0
  O  O9  1  0.059  0.316  0.802  1.0
  O  O10  1  0.631  0.334  0.249  1.0
  O  O11  1  0.131  0.666  0.251  1.0
  O  O12  1  0.936  0.919  0.617  1.0
  O  O13  1  0.436  0.081  0.883  1.0
  O  O14  1  0.064  0.081  0.383  1.0
  O  O15  1  0.564  0.919  0.117  1.0
  O  O16  1  0.771  0.051  0.509  1.0
  O  O17  1  0.271  0.949  0.991  1.0
  O  O18  1  0.229  0.949  0.491  1.0
  O  O19  1  0.729  0.051  0.009  1.0
  O  O20  1  0.869  0.334  0.749  1.0
  O  O21  1  0.369  0.666  0.751  1.0
[/CIF]
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The compound described by U(O4I)2 crystallizes in the monoclinic P2_1/c space group. U(1) is bonded to two equivalent O(1), two equivalent O(2), and four equivalent O(3) atoms to form distorted edge-sharing UO8 hexagonal bipyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one U(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one U(1) and two equivalent I(1) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent U(1) and one I(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to two equivalent I(1) atoms. I(1) is bonded in a 3-coordinate geometry to one O(3), two equivalent O(2), and two equivalent O(4) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_U(IO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   16.294
_cell_length_b   4.206
_cell_length_c   5.720
_cell_angle_alpha   62.466
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   347.586
_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  0.500  0.500  0.000  1.0
  U  U1  1  0.000  0.500  0.500  1.0
  I  I2  1  0.663  0.891  0.293  1.0
  I  I3  1  0.163  0.109  0.207  1.0
  I  I4  1  0.337  0.109  0.707  1.0
  I  I5  1  0.837  0.891  0.793  1.0
  O  O6  1  0.441  0.316  0.302  1.0
  O  O7  1  0.941  0.684  0.198  1.0
  O  O8  1  0.559  0.684  0.698  1.0
  O  O9  1  0.059  0.316  0.802  1.0
  O  O10  1  0.631  0.334  0.249  1.0
  O  O11  1  0.131  0.666  0.251  1.0
  O  O12  1  0.936  0.919  0.617  1.0
  O  O13  1  0.436  0.081  0.883  1.0
  O  O14  1  0.064  0.081  0.383  1.0
  O  O15  1  0.564  0.919  0.117  1.0
  O  O16  1  0.771  0.051  0.509  1.0
  O  O17  1  0.271  0.949  0.991  1.0
  O  O18  1  0.229  0.949  0.491  1.0
  O  O19  1  0.729  0.051  0.009  1.0
  O  O20  1  0.869  0.334  0.749  1.0
  O  O21  1  0.369  0.666  0.751  1.0
[/CIF]
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