The crystal structure described by URe2 is Frank-Kasper $\mu$ Phase-like structured and crystallizes in the orthorhombic Cmcm space group. U(1) is bonded in a 14-coordinate geometry to two equivalent U(1), three equivalent Re(1), three equivalent Re(3), and six equivalent Re(2) atoms. There are three inequivalent Re sites. In the first Re site, Re(1) is bonded to six equivalent U(1), two equivalent Re(3), and four equivalent Re(2) atoms to form a mixture of face, corner, and edge-sharing ReU6Re6 cuboctahedra. In the second Re site, Re(3) is bonded to six equivalent U(1), two equivalent Re(1), and four equivalent Re(2) atoms to form a mixture of face, corner, and edge-sharing ReU6Re6 cuboctahedra. In the third Re site, Re(2) is bonded to six equivalent U(1), two equivalent Re(1), two equivalent Re(2), and two equivalent Re(3) atoms to form a mixture of distorted face, corner, and edge-sharing ReU6Re6 cuboctahedra. is represented by the CIF card [CIF]
data_URe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.262
_cell_length_b   5.262
_cell_length_c   8.171
_cell_angle_alpha   89.994
_cell_angle_beta   89.988
_cell_angle_gamma   112.767
_symmetry_Int_Tables_number   1
_cell_volume   208.599
_cell_formula_units_Z   4
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  0.337  0.663  0.588  1.0
  U  U1  1  0.663  0.337  0.088  1.0
  U  U2  1  0.663  0.337  0.412  1.0
  U  U3  1  0.337  0.663  0.912  1.0
  Re  Re4  1  0.176  0.824  0.250  1.0
  Re  Re5  1  0.168  0.340  0.250  1.0
  Re  Re6  1  0.832  0.660  0.750  1.0
  Re  Re7  1  0.000  0.000  0.000  1.0
  Re  Re8  1  0.660  0.832  0.250  1.0
  Re  Re9  1  0.340  0.168  0.750  1.0
  Re  Re10  1  0.824  0.176  0.750  1.0
  Re  Re11  1  0.000  0.000  0.500  1.0
[/CIF]
.
The crystal structure described by URe2 is Frank-Kasper $\mu$ Phase-like structured and crystallizes in the orthorhombic Cmcm space group. U(1) is bonded in a 14-coordinate geometry to two equivalent U(1), three equivalent Re(1), three equivalent Re(3), and six equivalent Re(2) atoms. There are three inequivalent Re sites. In the first Re site, Re(1) is bonded to six equivalent U(1), two equivalent Re(3), and four equivalent Re(2) atoms to form a mixture of face, corner, and edge-sharing ReU6Re6 cuboctahedra. In the second Re site, Re(3) is bonded to six equivalent U(1), two equivalent Re(1), and four equivalent Re(2) atoms to form a mixture of face, corner, and edge-sharing ReU6Re6 cuboctahedra. In the third Re site, Re(2) is bonded to six equivalent U(1), two equivalent Re(1), two equivalent Re(2), and two equivalent Re(3) atoms to form a mixture of distorted face, corner, and edge-sharing ReU6Re6 cuboctahedra. is represented by the CIF card [CIF]
data_URe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.262
_cell_length_b   5.262
_cell_length_c   8.171
_cell_angle_alpha   89.994
_cell_angle_beta   89.988
_cell_angle_gamma   112.767
_symmetry_Int_Tables_number   1
_cell_volume   208.599
_cell_formula_units_Z   4
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  0.337  0.663  0.588  1.0
  U  U1  1  0.663  0.337  0.088  1.0
  U  U2  1  0.663  0.337  0.412  1.0
  U  U3  1  0.337  0.663  0.912  1.0
  Re  Re4  1  0.176  0.824  0.250  1.0
  Re  Re5  1  0.168  0.340  0.250  1.0
  Re  Re6  1  0.832  0.660  0.750  1.0
  Re  Re7  1  0.000  0.000  0.000  1.0
  Re  Re8  1  0.660  0.832  0.250  1.0
  Re  Re9  1  0.340  0.168  0.750  1.0
  Re  Re10  1  0.824  0.176  0.750  1.0
  Re  Re11  1  0.000  0.000  0.500  1.0
[/CIF]
.