The structure described by CsC2H crystallizes in the trigonal R3c space group. Cs(1) is bonded in a 4-coordinate geometry to five equivalent C(2) atoms. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted single-bond geometry to one C(2) and one H(1) atom. In the second C site, C(2) is bonded in a 6-coordinate geometry to five equivalent Cs(1) and one C(1) atom. H(1) is bonded in a single-bond geometry to one C(1) atom. is represented by the CIF file [CIF]
data_CsHC2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.159
_cell_length_b   9.159
_cell_length_c   9.159
_cell_angle_alpha   109.149
_cell_angle_beta   109.149
_cell_angle_gamma   109.149
_symmetry_Int_Tables_number   1
_cell_volume   598.436
_cell_formula_units_Z   6
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
  Cs  Cs0  1  0.383  0.735  0.258  1.0
  Cs  Cs1  1  0.735  0.258  0.383  1.0
  Cs  Cs2  1  0.258  0.383  0.735  1.0
  Cs  Cs3  1  0.758  0.235  0.883  1.0
  Cs  Cs4  1  0.235  0.883  0.758  1.0
  Cs  Cs5  1  0.883  0.758  0.235  1.0
  H  H6  1  0.794  0.645  0.811  1.0
  H  H7  1  0.645  0.811  0.794  1.0
  H  H8  1  0.811  0.794  0.645  1.0
  H  H9  1  0.311  0.145  0.294  1.0
  H  H10  1  0.145  0.294  0.311  1.0
  H  H11  1  0.294  0.311  0.145  1.0
  C  C12  1  0.400  0.332  0.113  1.0
  C  C13  1  0.113  0.400  0.332  1.0
  C  C14  1  0.332  0.113  0.400  1.0
  C  C15  1  0.832  0.900  0.613  1.0
  C  C16  1  0.613  0.832  0.900  1.0
  C  C17  1  0.900  0.613  0.832  1.0
  C  C18  1  0.521  0.359  0.075  1.0
  C  C19  1  0.075  0.521  0.359  1.0
  C  C20  1  0.359  0.075  0.521  1.0
  C  C21  1  0.859  0.021  0.575  1.0
  C  C22  1  0.575  0.859  0.021  1.0
  C  C23  1  0.021  0.575  0.859  1.0
[/CIF]
.
The structure described by CsC2H crystallizes in the trigonal R3c space group. Cs(1) is bonded in a 4-coordinate geometry to five equivalent C(2) atoms. There are two inequivalent C sites. In the first C site, C(1) is bonded in a distorted single-bond geometry to one C(2) and one H(1) atom. In the second C site, C(2) is bonded in a 6-coordinate geometry to five equivalent Cs(1) and one C(1) atom. H(1) is bonded in a single-bond geometry to one C(1) atom. is represented by the CIF file [CIF]
data_CsHC2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.159
_cell_length_b   9.159
_cell_length_c   9.159
_cell_angle_alpha   109.149
_cell_angle_beta   109.149
_cell_angle_gamma   109.149
_symmetry_Int_Tables_number   1
_cell_volume   598.436
_cell_formula_units_Z   6
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
  Cs  Cs0  1  0.383  0.735  0.258  1.0
  Cs  Cs1  1  0.735  0.258  0.383  1.0
  Cs  Cs2  1  0.258  0.383  0.735  1.0
  Cs  Cs3  1  0.758  0.235  0.883  1.0
  Cs  Cs4  1  0.235  0.883  0.758  1.0
  Cs  Cs5  1  0.883  0.758  0.235  1.0
  H  H6  1  0.794  0.645  0.811  1.0
  H  H7  1  0.645  0.811  0.794  1.0
  H  H8  1  0.811  0.794  0.645  1.0
  H  H9  1  0.311  0.145  0.294  1.0
  H  H10  1  0.145  0.294  0.311  1.0
  H  H11  1  0.294  0.311  0.145  1.0
  C  C12  1  0.400  0.332  0.113  1.0
  C  C13  1  0.113  0.400  0.332  1.0
  C  C14  1  0.332  0.113  0.400  1.0
  C  C15  1  0.832  0.900  0.613  1.0
  C  C16  1  0.613  0.832  0.900  1.0
  C  C17  1  0.900  0.613  0.832  1.0
  C  C18  1  0.521  0.359  0.075  1.0
  C  C19  1  0.075  0.521  0.359  1.0
  C  C20  1  0.359  0.075  0.521  1.0
  C  C21  1  0.859  0.021  0.575  1.0
  C  C22  1  0.575  0.859  0.021  1.0
  C  C23  1  0.021  0.575  0.859  1.0
[/CIF]
.