The structure described by U2CuGa3 crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 14-coordinate geometry to two equivalent U(1), two equivalent Cu(1), two equivalent Ga(3), four equivalent Ga(1), and four equivalent Ga(2) atoms. In the second U site, U(2) is bonded in a 14-coordinate geometry to two equivalent U(2), four equivalent Cu(1), two equivalent Ga(1), two equivalent Ga(2), and four equivalent Ga(3) atoms. Cu(1) is bonded in a 11-coordinate geometry to two equivalent U(1), four equivalent U(2), two equivalent Cu(1), one Ga(3), and two equivalent Ga(2) atoms. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 11-coordinate geometry to two equivalent U(2), four equivalent U(1), one Ga(2), two equivalent Ga(1), and two equivalent Ga(3) atoms. In the second Ga site, Ga(2) is bonded in a 11-coordinate geometry to two equivalent U(2), four equivalent U(1), two equivalent Cu(1), one Ga(1), and two equivalent Ga(2) atoms. In the third Ga site, Ga(3) is bonded in a 11-coordinate geometry to two equivalent U(1), four equivalent U(2), one Cu(1), two equivalent Ga(1), and two equivalent Ga(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_U2Ga3Cu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.930
_cell_length_b   4.669
_cell_length_c   8.142
_cell_angle_alpha   89.997
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   111.375
_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  1.000  0.003  1.0
  U  U1  1  0.000  0.500  0.500  1.0
  Ga  Ga2  1  0.500  0.500  0.833  1.0
  Ga  Ga3  1  0.500  0.500  0.175  1.0
  Ga  Ga4  1  0.500  1.000  0.657  1.0
  Cu  Cu5  1  0.500  1.000  0.332  1.0
[/CIF]
.
The structure described by U2CuGa3 crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 14-coordinate geometry to two equivalent U(1), two equivalent Cu(1), two equivalent Ga(3), four equivalent Ga(1), and four equivalent Ga(2) atoms. In the second U site, U(2) is bonded in a 14-coordinate geometry to two equivalent U(2), four equivalent Cu(1), two equivalent Ga(1), two equivalent Ga(2), and four equivalent Ga(3) atoms. Cu(1) is bonded in a 11-coordinate geometry to two equivalent U(1), four equivalent U(2), two equivalent Cu(1), one Ga(3), and two equivalent Ga(2) atoms. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 11-coordinate geometry to two equivalent U(2), four equivalent U(1), one Ga(2), two equivalent Ga(1), and two equivalent Ga(3) atoms. In the second Ga site, Ga(2) is bonded in a 11-coordinate geometry to two equivalent U(2), four equivalent U(1), two equivalent Cu(1), one Ga(1), and two equivalent Ga(2) atoms. In the third Ga site, Ga(3) is bonded in a 11-coordinate geometry to two equivalent U(1), four equivalent U(2), one Cu(1), two equivalent Ga(1), and two equivalent Ga(3) atoms. is represented by the Crystallographic Information File (CIF) [CIF]
data_U2Ga3Cu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.930
_cell_length_b   4.669
_cell_length_c   8.142
_cell_angle_alpha   89.997
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   111.375
_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  1.000  0.003  1.0
  U  U1  1  0.000  0.500  0.500  1.0
  Ga  Ga2  1  0.500  0.500  0.833  1.0
  Ga  Ga3  1  0.500  0.500  0.175  1.0
  Ga  Ga4  1  0.500  1.000  0.657  1.0
  Cu  Cu5  1  0.500  1.000  0.332  1.0
[/CIF]
.