data_UGa5Ni
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.24
_cell_length_b   4.24
_cell_length_c   6.78
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   UGa5Ni
_chemical_formula_sum   'U1 Ga5 Ni1'
_cell_volume   121.7
_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  U6  1  0.0  0.0  0.39  1.0
  Ga  Ga0  1  0.12  0.12  0.39  1.0
  Ga  Ga1  1  0.12  0.0  0.46  1.0
  Ga  Ga2  1  0.0  0.12  0.46  1.0
  Ga  Ga3  1  0.12  0.0  0.32  1.0
  Ga  Ga4  1  0.0  0.12  0.32  1.0
  Ni  Ni5  1  0.0  0.0  0.0  1.0

data_UGa5Ni
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.99
_cell_length_b   5.99
_cell_length_c   6.78
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   UGa5Ni
_chemical_formula_sum   'U2 Ga10 Ni2'
_cell_volume   243.39
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  2  0.0  0.0  0.39  1.0
  Ga  Ga1  4  0.06  0.06  0.32  1.0
  Ga  Ga2  4  0.06  0.06  0.46  1.0
  Ga  Ga3  2  0.12  0.0  0.39  1.0
  Ni  Ni4  2  0.0  0.0  0.0  1.0

U Ga Ga Ga Ga Ga Ni
UNiGa5 crystallizes in the monoclinic Cm space group. The structure is zero-dimensional and consists of two UNiGa5 clusters. U(1) is bonded in a distorted single-bond geometry to one Ga(1), two equivalent Ga(2), and two equivalent Ga(3) atoms. The U(1)-Ga(1) bond length is 0.70 Å. Both U(1)-Ga(2) bond lengths are 0.69 Å. Both U(1)-Ga(3) bond lengths are 0.69 Å. Ni(1) is bonded in a 2-coordinate geometry to two equivalent Ga(3) atoms. Both Ni(1)-Ga(3) bond lengths are 2.24 Å. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a single-bond geometry to one U(1) and two equivalent Ga(3) atoms. Both Ga(1)-Ga(3) bond lengths are 0.69 Å. In the second Ga site, Ga(2) is bonded in a distorted single-bond geometry to one U(1) atom. In the third Ga site, Ga(3) is bonded in a 3-coordinate geometry to one U(1), one Ni(1), one Ga(1), and one Ga(3) atom. The Ga(3)-Ga(3) bond length is 0.70 Å.