The crystal structure described by U2Mo2C3 crystallizes in the monoclinic C2/m space group. U(1) is bonded to two equivalent C(2) and three equivalent C(1) atoms to form distorted UC5 square pyramids that share corners with two equivalent U(1)C5 square pyramids, corners with seven equivalent Mo(1)C4 trigonal pyramids, edges with five equivalent U(1)C5 square pyramids, and edges with three equivalent Mo(1)C4 trigonal pyramids. Mo(1) is bonded to one C(2) and three equivalent C(1) atoms to form distorted MoC4 trigonal pyramids that share corners with seven equivalent U(1)C5 square pyramids, corners with three equivalent Mo(1)C4 trigonal pyramids, edges with three equivalent U(1)C5 square pyramids, and edges with two equivalent Mo(1)C4 trigonal pyramids. There are two inequivalent C sites. In the first C site, C(1) is bonded to three equivalent U(1) and three equivalent Mo(1) atoms to form CU3Mo3 octahedra that share corners with three equivalent C(2)U4Mo2 octahedra, edges with three equivalent C(2)U4Mo2 octahedra, and edges with six equivalent C(1)U3Mo3 octahedra. The corner-sharing octahedral tilt angles range from 18-26°. In the second C site, C(2) is bonded to four equivalent U(1) and two equivalent Mo(1) atoms to form CU4Mo2 octahedra that share corners with six equivalent C(1)U3Mo3 octahedra, edges with two equivalent C(2)U4Mo2 octahedra, and edges with six equivalent C(1)U3Mo3 octahedra. The corner-sharing octahedral tilt angles range from 18-26°. is represented by the CIF file [CIF]
data_U2Mo2C3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.161
_cell_length_b   6.161
_cell_length_c   5.578
_cell_angle_alpha   68.900
_cell_angle_beta   68.900
_cell_angle_gamma   29.721
_symmetry_Int_Tables_number   1
_cell_volume   97.422
_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  0.603  0.603  0.191  1.0
  U  U1  1  0.397  0.397  0.809  1.0
  Mo  Mo2  1  0.846  0.846  0.336  1.0
  Mo  Mo3  1  0.154  0.154  0.664  1.0
  C  C4  1  0.750  0.750  0.758  1.0
  C  C5  1  0.250  0.250  0.242  1.0
  C  C6  1  0.000  0.000  0.000  1.0
[/CIF]
.
The crystal structure described by U2Mo2C3 crystallizes in the monoclinic C2/m space group. U(1) is bonded to two equivalent C(2) and three equivalent C(1) atoms to form distorted UC5 square pyramids that share corners with two equivalent U(1)C5 square pyramids, corners with seven equivalent Mo(1)C4 trigonal pyramids, edges with five equivalent U(1)C5 square pyramids, and edges with three equivalent Mo(1)C4 trigonal pyramids. Mo(1) is bonded to one C(2) and three equivalent C(1) atoms to form distorted MoC4 trigonal pyramids that share corners with seven equivalent U(1)C5 square pyramids, corners with three equivalent Mo(1)C4 trigonal pyramids, edges with three equivalent U(1)C5 square pyramids, and edges with two equivalent Mo(1)C4 trigonal pyramids. There are two inequivalent C sites. In the first C site, C(1) is bonded to three equivalent U(1) and three equivalent Mo(1) atoms to form CU3Mo3 octahedra that share corners with three equivalent C(2)U4Mo2 octahedra, edges with three equivalent C(2)U4Mo2 octahedra, and edges with six equivalent C(1)U3Mo3 octahedra. The corner-sharing octahedral tilt angles range from 18-26°. In the second C site, C(2) is bonded to four equivalent U(1) and two equivalent Mo(1) atoms to form CU4Mo2 octahedra that share corners with six equivalent C(1)U3Mo3 octahedra, edges with two equivalent C(2)U4Mo2 octahedra, and edges with six equivalent C(1)U3Mo3 octahedra. The corner-sharing octahedral tilt angles range from 18-26°. is represented by the CIF file [CIF]
data_U2Mo2C3
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.161
_cell_length_b   6.161
_cell_length_c   5.578
_cell_angle_alpha   68.900
_cell_angle_beta   68.900
_cell_angle_gamma   29.721
_symmetry_Int_Tables_number   1
_cell_volume   97.422
_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  0.603  0.603  0.191  1.0
  U  U1  1  0.397  0.397  0.809  1.0
  Mo  Mo2  1  0.846  0.846  0.336  1.0
  Mo  Mo3  1  0.154  0.154  0.664  1.0
  C  C4  1  0.750  0.750  0.758  1.0
  C  C5  1  0.250  0.250  0.242  1.0
  C  C6  1  0.000  0.000  0.000  1.0
[/CIF]
.