The crystal structure described by UCoNi is Hexagonal Laves-derived structured and crystallizes in the orthorhombic Imma space group. U(1) is bonded in a 12-coordinate geometry to six equivalent Co(1) and six equivalent Ni(1) atoms. Co(1) is bonded to six equivalent U(1), two equivalent Co(1), and four equivalent Ni(1) atoms to form CoU6Co2Ni4 cuboctahedra that share corners with eight equivalent Ni(1)U6Co4Ni2 cuboctahedra, corners with ten equivalent Co(1)U6Co2Ni4 cuboctahedra, edges with six equivalent Co(1)U6Co2Ni4 cuboctahedra, faces with six equivalent Co(1)U6Co2Ni4 cuboctahedra, and faces with twelve equivalent Ni(1)U6Co4Ni2 cuboctahedra. Ni(1) is bonded to six equivalent U(1), four equivalent Co(1), and two equivalent Ni(1) atoms to form NiU6Co4Ni2 cuboctahedra that share corners with eight equivalent Co(1)U6Co2Ni4 cuboctahedra, corners with ten equivalent Ni(1)U6Co4Ni2 cuboctahedra, edges with six equivalent Ni(1)U6Co4Ni2 cuboctahedra, faces with six equivalent Ni(1)U6Co4Ni2 cuboctahedra, and faces with twelve equivalent Co(1)U6Co2Ni4 cuboctahedra. is represented by the CIF card [CIF]
data_UCoNi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.919
_cell_length_b   4.919
_cell_length_c   4.919
_cell_angle_alpha   120.798
_cell_angle_beta   119.353
_cell_angle_gamma   89.874
_symmetry_Int_Tables_number   1
_cell_volume   84.066
_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  0.123  0.873  0.250  1.0
  U  U1  1  0.877  0.127  0.750  1.0
  Co  Co2  1  0.000  0.500  0.500  1.0
  Co  Co3  1  0.500  0.500  0.000  1.0
  Ni  Ni4  1  0.500  0.000  0.000  1.0
  Ni  Ni5  1  0.500  0.500  0.500  1.0
[/CIF]
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The crystal structure described by UCoNi is Hexagonal Laves-derived structured and crystallizes in the orthorhombic Imma space group. U(1) is bonded in a 12-coordinate geometry to six equivalent Co(1) and six equivalent Ni(1) atoms. Co(1) is bonded to six equivalent U(1), two equivalent Co(1), and four equivalent Ni(1) atoms to form CoU6Co2Ni4 cuboctahedra that share corners with eight equivalent Ni(1)U6Co4Ni2 cuboctahedra, corners with ten equivalent Co(1)U6Co2Ni4 cuboctahedra, edges with six equivalent Co(1)U6Co2Ni4 cuboctahedra, faces with six equivalent Co(1)U6Co2Ni4 cuboctahedra, and faces with twelve equivalent Ni(1)U6Co4Ni2 cuboctahedra. Ni(1) is bonded to six equivalent U(1), four equivalent Co(1), and two equivalent Ni(1) atoms to form NiU6Co4Ni2 cuboctahedra that share corners with eight equivalent Co(1)U6Co2Ni4 cuboctahedra, corners with ten equivalent Ni(1)U6Co4Ni2 cuboctahedra, edges with six equivalent Ni(1)U6Co4Ni2 cuboctahedra, faces with six equivalent Ni(1)U6Co4Ni2 cuboctahedra, and faces with twelve equivalent Co(1)U6Co2Ni4 cuboctahedra. is represented by the CIF card [CIF]
data_UCoNi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.919
_cell_length_b   4.919
_cell_length_c   4.919
_cell_angle_alpha   120.798
_cell_angle_beta   119.353
_cell_angle_gamma   89.874
_symmetry_Int_Tables_number   1
_cell_volume   84.066
_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  0.123  0.873  0.250  1.0
  U  U1  1  0.877  0.127  0.750  1.0
  Co  Co2  1  0.000  0.500  0.500  1.0
  Co  Co3  1  0.500  0.500  0.000  1.0
  Ni  Ni4  1  0.500  0.000  0.000  1.0
  Ni  Ni5  1  0.500  0.500  0.500  1.0
[/CIF]
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