The compound described by UCd2O5 crystallizes in the monoclinic C2/c space group. U(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form UO6 octahedra that share corners with two equivalent U(1)O6 octahedra and corners with ten equivalent Cd(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 54°. Cd(1) is bonded to one O(1), one O(3), and two equivalent O(2) atoms to form distorted CdO4 tetrahedra that share corners with five equivalent U(1)O6 octahedra and corners with three equivalent Cd(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 31-76°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one U(1) and one Cd(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one U(1) and two equivalent Cd(1) atoms. In the third O site, O(3) is bonded to two equivalent U(1) and two equivalent Cd(1) atoms to form corner-sharing OU2Cd2 tetrahedra. is represented by the CIF file [CIF]
data_UCd2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.368
_cell_length_b   6.368
_cell_length_c   8.216
_cell_angle_alpha   72.349
_cell_angle_beta   72.349
_cell_angle_gamma   49.983
_symmetry_Int_Tables_number   1
_cell_volume   240.500
_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  0.000  0.000  0.500  1.0
  U  U1  1  0.000  0.000  0.000  1.0
  Cd  Cd2  1  0.629  0.704  0.682  1.0
  Cd  Cd3  1  0.296  0.371  0.818  1.0
  Cd  Cd4  1  0.704  0.629  0.182  1.0
  Cd  Cd5  1  0.371  0.296  0.318  1.0
  O  O6  1  0.142  0.633  0.479  1.0
  O  O7  1  0.858  0.367  0.521  1.0
  O  O8  1  0.618  0.071  0.625  1.0
  O  O9  1  0.194  0.806  0.750  1.0
  O  O10  1  0.929  0.382  0.875  1.0
  O  O11  1  0.633  0.142  0.979  1.0
  O  O12  1  0.367  0.858  0.021  1.0
  O  O13  1  0.071  0.618  0.125  1.0
  O  O14  1  0.806  0.194  0.250  1.0
  O  O15  1  0.382  0.929  0.375  1.0
[/CIF]
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The compound described by UCd2O5 crystallizes in the monoclinic C2/c space group. U(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form UO6 octahedra that share corners with two equivalent U(1)O6 octahedra and corners with ten equivalent Cd(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 54°. Cd(1) is bonded to one O(1), one O(3), and two equivalent O(2) atoms to form distorted CdO4 tetrahedra that share corners with five equivalent U(1)O6 octahedra and corners with three equivalent Cd(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 31-76°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one U(1) and one Cd(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one U(1) and two equivalent Cd(1) atoms. In the third O site, O(3) is bonded to two equivalent U(1) and two equivalent Cd(1) atoms to form corner-sharing OU2Cd2 tetrahedra. is represented by the CIF file [CIF]
data_UCd2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.368
_cell_length_b   6.368
_cell_length_c   8.216
_cell_angle_alpha   72.349
_cell_angle_beta   72.349
_cell_angle_gamma   49.983
_symmetry_Int_Tables_number   1
_cell_volume   240.500
_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  0.000  0.000  0.500  1.0
  U  U1  1  0.000  0.000  0.000  1.0
  Cd  Cd2  1  0.629  0.704  0.682  1.0
  Cd  Cd3  1  0.296  0.371  0.818  1.0
  Cd  Cd4  1  0.704  0.629  0.182  1.0
  Cd  Cd5  1  0.371  0.296  0.318  1.0
  O  O6  1  0.142  0.633  0.479  1.0
  O  O7  1  0.858  0.367  0.521  1.0
  O  O8  1  0.618  0.071  0.625  1.0
  O  O9  1  0.194  0.806  0.750  1.0
  O  O10  1  0.929  0.382  0.875  1.0
  O  O11  1  0.633  0.142  0.979  1.0
  O  O12  1  0.367  0.858  0.021  1.0
  O  O13  1  0.071  0.618  0.125  1.0
  O  O14  1  0.806  0.194  0.250  1.0
  O  O15  1  0.382  0.929  0.375  1.0
[/CIF]
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