data_[C4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  C  2.5500  0.7000  0.3000
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [4.2750]
_cell_length_b [2.4681]
_cell_length_c [4.3059]
_cell_angle_alpha [90.0000]
_cell_angle_beta [97.1980]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [C]
_chemical_formula_sum '[C4]'
_cell_volume [45.0735]
_cell_formula_units_Z [4]
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
[
  C  C0  4  0.1667  0.0000  0.0000  1.0
]