data_SbC2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.23
_cell_length_b   5.31
_cell_length_c   3.38
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SbC2
_chemical_formula_sum   'Sb2 C4'
_cell_volume   75.86
_cell_formula_units_Z   2
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
  Sb  Sb4  1  0.0  0.0  0.0  1.0
  Sb  Sb5  1  0.11  0.65  0.69  1.0
  C  C0  1  0.55  0.07  0.0  1.0
  C  C1  1  0.67  0.24  0.0  1.0
  C  C2  1  0.67  0.89  0.69  1.0
  C  C3  1  0.56  0.41  0.69  1.0

data_SbC2
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.38
_cell_length_b   4.23
_cell_length_c   5.31
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SbC2
_chemical_formula_sum   'Sb2 C4'
_cell_volume   75.86
_cell_formula_units_Z   2
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
  Sb  Sb0  1  0.0  0.0  0.0  1.0
  Sb  Sb1  1  0.69  0.11  0.65  1.0
  C  C2  1  -0.0  0.67  0.24  1.0
  C  C3  1  -0.0  0.55  0.07  1.0
  C  C4  1  0.69  0.56  0.41  1.0
  C  C5  1  0.69  0.67  0.89  1.0

Sb Sb C C C C
CSbC crystallizes in the triclinic P1 space group. There are four inequivalent C sites. In the first C site, C(1) is bonded in a 4-coordinate geometry to one C(2), one C(3), and two equivalent Sb(1) atoms. The C(1)-C(2) bond length is 1.04 Å. The C(1)-C(3) bond length is 1.47 Å. There is one shorter (1.91 Å) and one longer (2.37 Å) C(1)-Sb(1) bond length. In the second C site, C(2) is bonded in a 3-coordinate geometry to one C(1), one C(4), and one Sb(1) atom. The C(2)-C(4) bond length is 1.47 Å. The C(2)-Sb(1) bond length is 1.89 Å. In the third C site, C(3) is bonded in a 5-coordinate geometry to one C(1), two equivalent Sb(1), and two equivalent Sb(2) atoms. There is one shorter (1.84 Å) and one longer (2.78 Å) C(3)-Sb(1) bond length. There is one shorter (2.27 Å) and one longer (2.67 Å) C(3)-Sb(2) bond length. In the fourth C site, C(4) is bonded in a 3-coordinate geometry to one C(2) and two equivalent Sb(2) atoms. There is one shorter (2.27 Å) and one longer (2.67 Å) C(4)-Sb(2) bond length. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 4-coordinate geometry to one C(2), two equivalent C(1), two equivalent C(3), and one Sb(2) atom. The Sb(1)-Sb(2) bond length is 2.17 Å. In the second Sb site, Sb(2) is bonded in a 5-coordinate geometry to two equivalent C(3), two equivalent C(4), and one Sb(1) atom.