data_Rb2C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.51
_cell_length_b   4.51
_cell_length_c   16.23
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Rb2C
_chemical_formula_sum   'Rb4 C2'
_cell_volume   285.33
_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
  Rb  Rb2  1  0.0  0.6  0.95  1.0
  Rb  Rb3  1  0.25  0.3  0.83  1.0
  Rb  Rb4  1  0.25  0.3  0.29  1.0
  Rb  Rb5  1  0.0  0.6  0.4  1.0
  C  C0  1  0.0  0.0  0.18  1.0
  C  C1  1  0.0  0.0  0.06  1.0

data_Rb2C
_symmetry_space_group_name_H-M   P1
_cell_length_a   4.51
_cell_length_b   4.51
_cell_length_c   16.23
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Rb2C
_chemical_formula_sum   'Rb4 C2'
_cell_volume   285.33
_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
  Rb  Rb0  1  0.0  0.6  0.4  1.0
  Rb  Rb1  1  0.0  0.6  0.95  1.0
  Rb  Rb2  1  0.25  0.3  0.29  1.0
  Rb  Rb3  1  0.25  0.3  0.83  1.0
  C  C4  1  0.0  0.0  0.06  1.0
  C  C5  1  0.0  0.0  0.18  1.0

Rb Rb Rb Rb C C