The compound described by UB2C crystallizes in the trigonal R-3m space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 3-coordinate geometry to three equivalent C(1) atoms. In the second U site, U(2) is bonded to six equivalent C(1) atoms to form distorted corner-sharing UC6 octahedra. The corner-sharing octahedra are not tilted. B(1) is bonded in a distorted single-bond geometry to one C(1) atom. C(1) is bonded to two equivalent U(1), two equivalent U(2), and two equivalent B(1) atoms to form a mixture of distorted edge and corner-sharing CU4B2 octahedra. The corner-sharing octahedral tilt angles range from 0-78°. is represented by the CIF file [CIF]
data_UB2C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.196
_cell_length_b   5.196
_cell_length_c   5.196
_cell_angle_alpha   78.112
_cell_angle_beta   78.112
_cell_angle_gamma   78.112
_symmetry_Int_Tables_number   1
_cell_volume   132.320
_cell_formula_units_Z   3
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  0.690  0.690  0.690  1.0
  U  U1  1  0.310  0.310  0.310  1.0
  U  U2  1  0.000  0.000  0.000  1.0
  B  B3  1  0.771  0.229  0.500  1.0
  B  B4  1  0.229  0.500  0.771  1.0
  B  B5  1  0.500  0.771  0.229  1.0
  B  B6  1  0.229  0.771  0.500  1.0
  B  B7  1  0.771  0.500  0.229  1.0
  B  B8  1  0.500  0.229  0.771  1.0
  C  C9  1  0.500  0.000  0.000  1.0
  C  C10  1  0.000  0.500  0.000  1.0
  C  C11  1  0.000  0.000  0.500  1.0
[/CIF]
.
The compound described by UB2C crystallizes in the trigonal R-3m space group. There are two inequivalent U sites. In the first U site, U(1) is bonded in a 3-coordinate geometry to three equivalent C(1) atoms. In the second U site, U(2) is bonded to six equivalent C(1) atoms to form distorted corner-sharing UC6 octahedra. The corner-sharing octahedra are not tilted. B(1) is bonded in a distorted single-bond geometry to one C(1) atom. C(1) is bonded to two equivalent U(1), two equivalent U(2), and two equivalent B(1) atoms to form a mixture of distorted edge and corner-sharing CU4B2 octahedra. The corner-sharing octahedral tilt angles range from 0-78°. is represented by the CIF file [CIF]
data_UB2C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.196
_cell_length_b   5.196
_cell_length_c   5.196
_cell_angle_alpha   78.112
_cell_angle_beta   78.112
_cell_angle_gamma   78.112
_symmetry_Int_Tables_number   1
_cell_volume   132.320
_cell_formula_units_Z   3
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  0.690  0.690  0.690  1.0
  U  U1  1  0.310  0.310  0.310  1.0
  U  U2  1  0.000  0.000  0.000  1.0
  B  B3  1  0.771  0.229  0.500  1.0
  B  B4  1  0.229  0.500  0.771  1.0
  B  B5  1  0.500  0.771  0.229  1.0
  B  B6  1  0.229  0.771  0.500  1.0
  B  B7  1  0.771  0.500  0.229  1.0
  B  B8  1  0.500  0.229  0.771  1.0
  C  C9  1  0.500  0.000  0.000  1.0
  C  C10  1  0.000  0.500  0.000  1.0
  C  C11  1  0.000  0.000  0.500  1.0
[/CIF]
.