The structure described by U2Ga2O5 crystallizes in the tetragonal P4/mmm space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a body-centered cubic geometry to eight equivalent O(1) atoms. In the second U site, U(2) is bonded to four equivalent O(2) and eight equivalent O(1) atoms to form UO12 cuboctahedra that share corners with four equivalent U(2)O12 cuboctahedra, faces with four equivalent U(2)O12 cuboctahedra, and faces with eight equivalent Ga(1)O5 square pyramids. Ga(1) is bonded to one O(2) and four equivalent O(1) atoms to form GaO5 square pyramids that share corners with five equivalent Ga(1)O5 square pyramids and faces with four equivalent U(2)O12 cuboctahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent U(1), two equivalent U(2), and two equivalent Ga(1) atoms to form a mixture of distorted face, corner, and edge-sharing OU4Ga2 octahedra. The corner-sharing octahedral tilt angles range from 0-67°. In the second O site, O(2) is bonded in a linear geometry to four equivalent U(2) and two equivalent Ga(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_U2Ga2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.024
_cell_length_b   4.024
_cell_length_c   6.833
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   110.663
_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  0.000  0.000  0.000  1.0
  U  U1  1  0.000  0.000  0.500  1.0
  Ga  Ga2  1  0.500  0.500  0.789  1.0
  Ga  Ga3  1  0.500  0.500  0.211  1.0
  O  O4  1  0.000  0.500  0.761  1.0
  O  O5  1  0.000  0.500  0.239  1.0
  O  O6  1  0.500  0.500  0.500  1.0
  O  O7  1  0.500  0.000  0.761  1.0
  O  O8  1  0.500  0.000  0.239  1.0
[/CIF]
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The structure described by U2Ga2O5 crystallizes in the tetragonal P4/mmm space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a body-centered cubic geometry to eight equivalent O(1) atoms. In the second U site, U(2) is bonded to four equivalent O(2) and eight equivalent O(1) atoms to form UO12 cuboctahedra that share corners with four equivalent U(2)O12 cuboctahedra, faces with four equivalent U(2)O12 cuboctahedra, and faces with eight equivalent Ga(1)O5 square pyramids. Ga(1) is bonded to one O(2) and four equivalent O(1) atoms to form GaO5 square pyramids that share corners with five equivalent Ga(1)O5 square pyramids and faces with four equivalent U(2)O12 cuboctahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent U(1), two equivalent U(2), and two equivalent Ga(1) atoms to form a mixture of distorted face, corner, and edge-sharing OU4Ga2 octahedra. The corner-sharing octahedral tilt angles range from 0-67°. In the second O site, O(2) is bonded in a linear geometry to four equivalent U(2) and two equivalent Ga(1) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_U2Ga2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.024
_cell_length_b   4.024
_cell_length_c   6.833
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   110.663
_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  0.000  0.000  0.000  1.0
  U  U1  1  0.000  0.000  0.500  1.0
  Ga  Ga2  1  0.500  0.500  0.789  1.0
  Ga  Ga3  1  0.500  0.500  0.211  1.0
  O  O4  1  0.000  0.500  0.761  1.0
  O  O5  1  0.000  0.500  0.239  1.0
  O  O6  1  0.500  0.500  0.500  1.0
  O  O7  1  0.500  0.000  0.761  1.0
  O  O8  1  0.500  0.000  0.239  1.0
[/CIF]
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