data_KC2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.85
_cell_length_b   9.85
_cell_length_c   2.63
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   163.59
_symmetry_Int_Tables_number   1
_chemical_formula_structural   KC2
_chemical_formula_sum   'K2 C4'
_cell_volume   72.06
_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
  K  K4  1  0.4  0.4  0.97  1.0
  K  K5  1  0.4  0.6  0.66  1.0
  C  C0  1  0.4  0.18  0.97  1.0
  C  C1  1  0.4  0.82  0.66  1.0
  C  C2  1  0.4  0.14  0.97  1.0
  C  C3  1  0.4  0.86  0.66  1.0

data_KC2
_symmetry_space_group_name_H-M   P-1
_cell_length_a   2.63
_cell_length_b   2.81
_cell_length_c   9.85
_cell_angle_alpha   98.2
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   KC2
_chemical_formula_sum   'K2 C4'
_cell_volume   72.06
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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
  K  K0  2  0.34  0.4  0.4  1.0
  C  C1  2  0.34  0.14  0.14  1.0
  C  C2  2  0.34  0.18  0.18  1.0

K K C C C C