data_Zn2C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.25
_cell_length_b   5.25
_cell_length_c   5.25
_cell_angle_alpha   149.85
_cell_angle_beta   149.85
_cell_angle_gamma   43.16
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Zn2C
_chemical_formula_sum   'Zn2 C1'
_cell_volume   36.4
_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
  Zn  Zn1  1  0.0  0.0  0.53  1.0
  Zn  Zn2  1  0.0  0.0  0.24  1.0
  C  C0  1  0.0  0.0  0.0  1.0

data_Zn2C
_symmetry_space_group_name_H-M   Cm
_cell_length_a   3.86
_cell_length_b   3.86
_cell_length_c   5.25
_cell_angle_alpha   90.0
_cell_angle_beta   111.58
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Zn2C
_chemical_formula_sum   'Zn4 C2'
_cell_volume   72.81
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  Zn  Zn0  2  0.0  0.0  0.47  1.0
  Zn  Zn1  2  0.0  0.0  0.76  1.0
  C  C2  2  0.0  0.0  0.0  1.0

Zn Zn C
Zn Zn C 0 1 o o o 1 2 o o o 