The material structure described by Hf2CH is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Hf(1) is bonded to three equivalent C(1) and three equivalent H(1) atoms to form a mixture of corner and edge-sharing HfH3C3 octahedra. The corner-sharing octahedra are not tilted. C(1) is bonded to six equivalent Hf(1) atoms to form CHf6 octahedra that share corners with six equivalent H(1)Hf6 octahedra, edges with six equivalent C(1)Hf6 octahedra, and edges with six equivalent H(1)Hf6 octahedra. The corner-sharing octahedral tilt angles are 3°. H(1) is bonded to six equivalent Hf(1) atoms to form HHf6 octahedra that share corners with six equivalent C(1)Hf6 octahedra, edges with six equivalent C(1)Hf6 octahedra, and edges with six equivalent H(1)Hf6 octahedra. The corner-sharing octahedral tilt angles are 3°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Hf2HC
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.516
_cell_length_b   5.516
_cell_length_c   5.516
_cell_angle_alpha   34.716
_cell_angle_beta   34.716
_cell_angle_gamma   34.716
_symmetry_Int_Tables_number   1
_cell_volume   48.580
_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  0.245  0.245  0.245  1.0
  Hf  Hf1  1  0.755  0.755  0.755  1.0
  H  H2  1  0.000  0.000  0.000  1.0
  C  C3  1  0.500  0.500  0.500  1.0
[/CIF]
.
The material structure described by Hf2CH is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Hf(1) is bonded to three equivalent C(1) and three equivalent H(1) atoms to form a mixture of corner and edge-sharing HfH3C3 octahedra. The corner-sharing octahedra are not tilted. C(1) is bonded to six equivalent Hf(1) atoms to form CHf6 octahedra that share corners with six equivalent H(1)Hf6 octahedra, edges with six equivalent C(1)Hf6 octahedra, and edges with six equivalent H(1)Hf6 octahedra. The corner-sharing octahedral tilt angles are 3°. H(1) is bonded to six equivalent Hf(1) atoms to form HHf6 octahedra that share corners with six equivalent C(1)Hf6 octahedra, edges with six equivalent C(1)Hf6 octahedra, and edges with six equivalent H(1)Hf6 octahedra. The corner-sharing octahedral tilt angles are 3°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Hf2HC
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.516
_cell_length_b   5.516
_cell_length_c   5.516
_cell_angle_alpha   34.716
_cell_angle_beta   34.716
_cell_angle_gamma   34.716
_symmetry_Int_Tables_number   1
_cell_volume   48.580
_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  0.245  0.245  0.245  1.0
  Hf  Hf1  1  0.755  0.755  0.755  1.0
  H  H2  1  0.000  0.000  0.000  1.0
  C  C3  1  0.500  0.500  0.500  1.0
[/CIF]
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