data_Cu3C2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.38
_cell_length_b   3.38
_cell_length_c   5.1
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Cu3C2
_chemical_formula_sum   'Cu3 C2'
_cell_volume   50.43
_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
  Cu  Cu2  1  0.0  0.0  0.0  1.0
  Cu  Cu3  1  0.69  0.98  0.39  1.0
  Cu  Cu4  1  0.0  0.95  0.71  1.0
  C  C0  1  0.69  0.98  0.28  1.0
  C  C1  1  0.0  0.95  0.82  1.0

data_Cu3C2
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.38
_cell_length_b   3.38
_cell_length_c   5.1
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Cu3C2
_chemical_formula_sum   'Cu3 C2'
_cell_volume   50.43
_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
  Cu  Cu0  1  -0.0  0.95  0.71  1.0
  Cu  Cu1  1  0.0  0.0  0.0  1.0
  Cu  Cu2  1  0.69  0.98  0.39  1.0
  C  C3  1  -0.0  0.95  0.82  1.0
  C  C4  1  0.69  0.98  0.28  1.0

Cu Cu Cu C C