The compound described by UHfC2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. U(1) is bonded to six equivalent C(1) atoms to form UC6 octahedra that share corners with six equivalent Hf(1)C6 octahedra, edges with six equivalent U(1)C6 octahedra, and edges with six equivalent Hf(1)C6 octahedra. The corner-sharing octahedral tilt angles are 2°. Hf(1) is bonded to six equivalent C(1) atoms to form HfC6 octahedra that share corners with six equivalent U(1)C6 octahedra, edges with six equivalent U(1)C6 octahedra, and edges with six equivalent Hf(1)C6 octahedra. The corner-sharing octahedral tilt angles are 2°. C(1) is bonded to three equivalent U(1) and three equivalent Hf(1) atoms to form a mixture of edge and corner-sharing CHf3U3 octahedra. The corner-sharing octahedra are not tilted. is represented by the CIF file [CIF]
data_HfUC2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.959
_cell_length_b   5.959
_cell_length_c   5.959
_cell_angle_alpha   32.659
_cell_angle_beta   32.659
_cell_angle_gamma   32.659
_symmetry_Int_Tables_number   1
_cell_volume   54.810
_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
  Hf  Hf0  1  0.000  0.000  0.000  1.0
  U  U1  1  0.500  0.500  0.500  1.0
  C  C2  1  0.253  0.253  0.253  1.0
  C  C3  1  0.747  0.747  0.747  1.0
[/CIF]
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The compound described by UHfC2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. U(1) is bonded to six equivalent C(1) atoms to form UC6 octahedra that share corners with six equivalent Hf(1)C6 octahedra, edges with six equivalent U(1)C6 octahedra, and edges with six equivalent Hf(1)C6 octahedra. The corner-sharing octahedral tilt angles are 2°. Hf(1) is bonded to six equivalent C(1) atoms to form HfC6 octahedra that share corners with six equivalent U(1)C6 octahedra, edges with six equivalent U(1)C6 octahedra, and edges with six equivalent Hf(1)C6 octahedra. The corner-sharing octahedral tilt angles are 2°. C(1) is bonded to three equivalent U(1) and three equivalent Hf(1) atoms to form a mixture of edge and corner-sharing CHf3U3 octahedra. The corner-sharing octahedra are not tilted. is represented by the CIF file [CIF]
data_HfUC2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.959
_cell_length_b   5.959
_cell_length_c   5.959
_cell_angle_alpha   32.659
_cell_angle_beta   32.659
_cell_angle_gamma   32.659
_symmetry_Int_Tables_number   1
_cell_volume   54.810
_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
  Hf  Hf0  1  0.000  0.000  0.000  1.0
  U  U1  1  0.500  0.500  0.500  1.0
  C  C2  1  0.253  0.253  0.253  1.0
  C  C3  1  0.747  0.747  0.747  1.0
[/CIF]
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