The compound described by U3Bi2O9 crystallizes in the tetragonal I-4m2 space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms. In the second U site, U(2) is bonded in a body-centered cubic geometry to four equivalent O(2) and four equivalent O(5) atoms. Bi(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms. There are five inequivalent O sites. In the first O site, O(1) is bonded to two equivalent U(1) and two equivalent Bi(1) atoms to form OU2Bi2 tetrahedra that share corners with two equivalent O(4)Bi4 tetrahedra, corners with two equivalent O(5)U4 tetrahedra, corners with four equivalent O(1)U2Bi2 tetrahedra, corners with four equivalent O(2)U4 tetrahedra,  an edgeedge with one O(4)Bi4 tetrahedra,  an edgeedge with one O(5)U4 tetrahedra, and edges with four equivalent O(3)U2Bi2 tetrahedra. In the second O site, O(2) is bonded to two equivalent U(1) and two equivalent U(2) atoms to form OU4 tetrahedra that share corners with two equivalent O(3)U2Bi2 tetrahedra, corners with two equivalent O(5)U4 tetrahedra, corners with four equivalent O(1)U2Bi2 tetrahedra, corners with eight equivalent O(2)U4 tetrahedra,  an edgeedge with one O(3)U2Bi2 tetrahedra, and edges with five equivalent O(5)U4 tetrahedra. In the third O site, O(3) is bonded to two equivalent U(1) and two equivalent Bi(1) atoms to form distorted OU2Bi2 tetrahedra that share corners with two equivalent O(2)U4 tetrahedra, corners with four equivalent O(4)Bi4 tetrahedra, corners with four equivalent O(3)U2Bi2 tetrahedra, corners with four equivalent O(5)U4 tetrahedra,  an edgeedge with one O(2)U4 tetrahedra, and edges with four equivalent O(1)U2Bi2 tetrahedra. In the fourth O site, O(4) is bonded to four equivalent Bi(1) atoms to form OBi4 tetrahedra that share corners with four equivalent O(4)Bi4 tetrahedra, corners with four equivalent O(1)U2Bi2 tetrahedra, corners with eight equivalent O(3)U2Bi2 tetrahedra, and edges with two equivalent O(1)U2Bi2 tetrahedra. In the fifth O site, O(5) is bonded to two equivalent U(1) and two equivalent U(2) atoms to form OU4 tetrahedra that share corners with two equivalent O(1)U2Bi2 tetrahedra, corners with two equivalent O(2)U4 tetrahedra, corners with four equivalent O(3)U2Bi2 tetrahedra, corners with eight equivalent O(5)U4 tetrahedra,  an edgeedge with one O(1)U2Bi2 tetrahedra, and edges with five equivalent O(2)U4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_U3Bi2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   14.327
_cell_length_b   14.327
_cell_length_c   14.327
_cell_angle_alpha   164.719
_cell_angle_beta   164.719
_cell_angle_gamma   21.676
_symmetry_Int_Tables_number   1
_cell_volume   204.228
_cell_formula_units_Z   1
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  0.401  0.401  0.000  1.0
  U  U1  1  0.000  0.000  0.000  1.0
  U  U2  1  0.599  0.599  0.000  1.0
  Bi  Bi3  1  0.201  0.201  0.000  1.0
  Bi  Bi4  1  0.799  0.799  0.000  1.0
  O  O5  1  0.857  0.357  0.500  1.0
  O  O6  1  0.454  0.954  0.500  1.0
  O  O7  1  0.046  0.546  0.500  1.0
  O  O8  1  0.643  0.143  0.500  1.0
  O  O9  1  0.139  0.639  0.500  1.0
  O  O10  1  0.750  0.250  0.500  1.0
  O  O11  1  0.361  0.861  0.500  1.0
  O  O12  1  0.952  0.452  0.500  1.0
  O  O13  1  0.548  0.048  0.500  1.0
[/CIF]
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The compound described by U3Bi2O9 crystallizes in the tetragonal I-4m2 space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms. In the second U site, U(2) is bonded in a body-centered cubic geometry to four equivalent O(2) and four equivalent O(5) atoms. Bi(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms. There are five inequivalent O sites. In the first O site, O(1) is bonded to two equivalent U(1) and two equivalent Bi(1) atoms to form OU2Bi2 tetrahedra that share corners with two equivalent O(4)Bi4 tetrahedra, corners with two equivalent O(5)U4 tetrahedra, corners with four equivalent O(1)U2Bi2 tetrahedra, corners with four equivalent O(2)U4 tetrahedra,  an edgeedge with one O(4)Bi4 tetrahedra,  an edgeedge with one O(5)U4 tetrahedra, and edges with four equivalent O(3)U2Bi2 tetrahedra. In the second O site, O(2) is bonded to two equivalent U(1) and two equivalent U(2) atoms to form OU4 tetrahedra that share corners with two equivalent O(3)U2Bi2 tetrahedra, corners with two equivalent O(5)U4 tetrahedra, corners with four equivalent O(1)U2Bi2 tetrahedra, corners with eight equivalent O(2)U4 tetrahedra,  an edgeedge with one O(3)U2Bi2 tetrahedra, and edges with five equivalent O(5)U4 tetrahedra. In the third O site, O(3) is bonded to two equivalent U(1) and two equivalent Bi(1) atoms to form distorted OU2Bi2 tetrahedra that share corners with two equivalent O(2)U4 tetrahedra, corners with four equivalent O(4)Bi4 tetrahedra, corners with four equivalent O(3)U2Bi2 tetrahedra, corners with four equivalent O(5)U4 tetrahedra,  an edgeedge with one O(2)U4 tetrahedra, and edges with four equivalent O(1)U2Bi2 tetrahedra. In the fourth O site, O(4) is bonded to four equivalent Bi(1) atoms to form OBi4 tetrahedra that share corners with four equivalent O(4)Bi4 tetrahedra, corners with four equivalent O(1)U2Bi2 tetrahedra, corners with eight equivalent O(3)U2Bi2 tetrahedra, and edges with two equivalent O(1)U2Bi2 tetrahedra. In the fifth O site, O(5) is bonded to two equivalent U(1) and two equivalent U(2) atoms to form OU4 tetrahedra that share corners with two equivalent O(1)U2Bi2 tetrahedra, corners with two equivalent O(2)U4 tetrahedra, corners with four equivalent O(3)U2Bi2 tetrahedra, corners with eight equivalent O(5)U4 tetrahedra,  an edgeedge with one O(1)U2Bi2 tetrahedra, and edges with five equivalent O(2)U4 tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_U3Bi2O9
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   14.327
_cell_length_b   14.327
_cell_length_c   14.327
_cell_angle_alpha   164.719
_cell_angle_beta   164.719
_cell_angle_gamma   21.676
_symmetry_Int_Tables_number   1
_cell_volume   204.228
_cell_formula_units_Z   1
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  0.401  0.401  0.000  1.0
  U  U1  1  0.000  0.000  0.000  1.0
  U  U2  1  0.599  0.599  0.000  1.0
  Bi  Bi3  1  0.201  0.201  0.000  1.0
  Bi  Bi4  1  0.799  0.799  0.000  1.0
  O  O5  1  0.857  0.357  0.500  1.0
  O  O6  1  0.454  0.954  0.500  1.0
  O  O7  1  0.046  0.546  0.500  1.0
  O  O8  1  0.643  0.143  0.500  1.0
  O  O9  1  0.139  0.639  0.500  1.0
  O  O10  1  0.750  0.250  0.500  1.0
  O  O11  1  0.361  0.861  0.500  1.0
  O  O12  1  0.952  0.452  0.500  1.0
  O  O13  1  0.548  0.048  0.500  1.0
[/CIF]
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