The crystal structure described by U2Re2C3 crystallizes in the monoclinic C2/m space group. U(1) is bonded in a distorted pentagonal planar geometry to two equivalent C(1) and three equivalent C(2) atoms. Re(1) is bonded to one C(1) and three equivalent C(2) atoms to form a mixture of distorted edge and corner-sharing ReC4 trigonal pyramids. There are two inequivalent C sites. In the first C site, C(1) is bonded to four equivalent U(1) and two equivalent Re(1) atoms to form CU4Re2 octahedra that share corners with twelve equivalent C(2)U3Re3 octahedra, edges with two equivalent C(1)U4Re2 octahedra, and faces with two equivalent C(2)U3Re3 octahedra. The corner-sharing octahedral tilt angles range from 39-60°. In the second C site, C(2) is bonded to three equivalent U(1) and three equivalent Re(1) atoms to form CU3Re3 octahedra that share corners with six equivalent C(1)U4Re2 octahedra, edges with six equivalent C(2)U3Re3 octahedra, and  a faceface with one C(1)U4Re2 octahedra. The corner-sharing octahedral tilt angles range from 39-60°. is represented by the CIF card [CIF]
data_U2Re2C3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.978
_cell_length_b   5.978
_cell_length_c   5.593
_cell_angle_alpha   75.332
_cell_angle_beta   75.332
_cell_angle_gamma   29.484
_symmetry_Int_Tables_number   1
_cell_volume   94.923
_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  0.398  0.398  0.827  1.0
  U  U1  1  0.602  0.602  0.173  1.0
  Re  Re2  1  0.155  0.155  0.630  1.0
  Re  Re3  1  0.845  0.845  0.370  1.0
  C  C4  1  0.000  0.000  0.500  1.0
  C  C5  1  0.746  0.746  0.760  1.0
  C  C6  1  0.254  0.254  0.240  1.0
[/CIF]
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The crystal structure described by U2Re2C3 crystallizes in the monoclinic C2/m space group. U(1) is bonded in a distorted pentagonal planar geometry to two equivalent C(1) and three equivalent C(2) atoms. Re(1) is bonded to one C(1) and three equivalent C(2) atoms to form a mixture of distorted edge and corner-sharing ReC4 trigonal pyramids. There are two inequivalent C sites. In the first C site, C(1) is bonded to four equivalent U(1) and two equivalent Re(1) atoms to form CU4Re2 octahedra that share corners with twelve equivalent C(2)U3Re3 octahedra, edges with two equivalent C(1)U4Re2 octahedra, and faces with two equivalent C(2)U3Re3 octahedra. The corner-sharing octahedral tilt angles range from 39-60°. In the second C site, C(2) is bonded to three equivalent U(1) and three equivalent Re(1) atoms to form CU3Re3 octahedra that share corners with six equivalent C(1)U4Re2 octahedra, edges with six equivalent C(2)U3Re3 octahedra, and  a faceface with one C(1)U4Re2 octahedra. The corner-sharing octahedral tilt angles range from 39-60°. is represented by the CIF card [CIF]
data_U2Re2C3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.978
_cell_length_b   5.978
_cell_length_c   5.593
_cell_angle_alpha   75.332
_cell_angle_beta   75.332
_cell_angle_gamma   29.484
_symmetry_Int_Tables_number   1
_cell_volume   94.923
_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  0.398  0.398  0.827  1.0
  U  U1  1  0.602  0.602  0.173  1.0
  Re  Re2  1  0.155  0.155  0.630  1.0
  Re  Re3  1  0.845  0.845  0.370  1.0
  C  C4  1  0.000  0.000  0.500  1.0
  C  C5  1  0.746  0.746  0.760  1.0
  C  C6  1  0.254  0.254  0.240  1.0
[/CIF]
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