The structure described by UCrNi crystallizes in the orthorhombic Imma space group. U(1) is bonded in a 16-coordinate geometry to four equivalent U(1), six equivalent Cr(1), and six equivalent Ni(1) atoms. Cr(1) is bonded to six equivalent U(1), two equivalent Cr(1), and four equivalent Ni(1) atoms to form distorted CrU6Cr2Ni4 cuboctahedra that share corners with eight equivalent Ni(1)U6Cr4Ni2 cuboctahedra, corners with ten equivalent Cr(1)U6Cr2Ni4 cuboctahedra, edges with six equivalent Cr(1)U6Cr2Ni4 cuboctahedra, faces with six equivalent Cr(1)U6Cr2Ni4 cuboctahedra, and faces with twelve equivalent Ni(1)U6Cr4Ni2 cuboctahedra. Ni(1) is bonded to six equivalent U(1), four equivalent Cr(1), and two equivalent Ni(1) atoms to form NiU6Cr4Ni2 cuboctahedra that share corners with eight equivalent Cr(1)U6Cr2Ni4 cuboctahedra, corners with ten equivalent Ni(1)U6Cr4Ni2 cuboctahedra, edges with six equivalent Ni(1)U6Cr4Ni2 cuboctahedra, faces with six equivalent Ni(1)U6Cr4Ni2 cuboctahedra, and faces with twelve equivalent Cr(1)U6Cr2Ni4 cuboctahedra. is represented by the CIF file [CIF]
data_UCrNi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.092
_cell_length_b   5.092
_cell_length_c   5.092
_cell_angle_alpha   94.519
_cell_angle_beta   57.432
_cell_angle_gamma   122.717
_symmetry_Int_Tables_number   1
_cell_volume   89.312
_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  0.500  0.747  0.753  1.0
  U  U1  1  0.000  0.003  0.997  1.0
  Cr  Cr2  1  0.750  0.375  0.875  1.0
  Cr  Cr3  1  0.250  0.375  0.375  1.0
  Ni  Ni4  1  0.250  0.875  0.375  1.0
  Ni  Ni5  1  0.750  0.375  0.375  1.0
[/CIF]
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The structure described by UCrNi crystallizes in the orthorhombic Imma space group. U(1) is bonded in a 16-coordinate geometry to four equivalent U(1), six equivalent Cr(1), and six equivalent Ni(1) atoms. Cr(1) is bonded to six equivalent U(1), two equivalent Cr(1), and four equivalent Ni(1) atoms to form distorted CrU6Cr2Ni4 cuboctahedra that share corners with eight equivalent Ni(1)U6Cr4Ni2 cuboctahedra, corners with ten equivalent Cr(1)U6Cr2Ni4 cuboctahedra, edges with six equivalent Cr(1)U6Cr2Ni4 cuboctahedra, faces with six equivalent Cr(1)U6Cr2Ni4 cuboctahedra, and faces with twelve equivalent Ni(1)U6Cr4Ni2 cuboctahedra. Ni(1) is bonded to six equivalent U(1), four equivalent Cr(1), and two equivalent Ni(1) atoms to form NiU6Cr4Ni2 cuboctahedra that share corners with eight equivalent Cr(1)U6Cr2Ni4 cuboctahedra, corners with ten equivalent Ni(1)U6Cr4Ni2 cuboctahedra, edges with six equivalent Ni(1)U6Cr4Ni2 cuboctahedra, faces with six equivalent Ni(1)U6Cr4Ni2 cuboctahedra, and faces with twelve equivalent Cr(1)U6Cr2Ni4 cuboctahedra. is represented by the CIF file [CIF]
data_UCrNi
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.092
_cell_length_b   5.092
_cell_length_c   5.092
_cell_angle_alpha   94.519
_cell_angle_beta   57.432
_cell_angle_gamma   122.717
_symmetry_Int_Tables_number   1
_cell_volume   89.312
_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  0.500  0.747  0.753  1.0
  U  U1  1  0.000  0.003  0.997  1.0
  Cr  Cr2  1  0.750  0.375  0.875  1.0
  Cr  Cr3  1  0.250  0.375  0.375  1.0
  Ni  Ni4  1  0.250  0.875  0.375  1.0
  Ni  Ni5  1  0.750  0.375  0.375  1.0
[/CIF]
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