data_[Si2C4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Si  1.9000  1.1000  0.5400
  C  2.5500  0.7000  0.3000
]
_symmetry_space_group_name_H-M [C2]
_cell_length_a [2.4721]
_cell_length_b [4.2818]
_cell_length_c [8.8110]
_cell_angle_alpha [90.0000]
_cell_angle_beta [96.7509]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [5]
_chemical_formula_structural [SiC2]
_chemical_formula_sum '[Si2 C4]'
_cell_volume [92.6171]
_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
[
  Si  Si0  2  0.0000  0.0770  0.0000  1
  C  C1  2  0.0000  0.1754  0.5000  1
  C  C2  2  0.0000  0.5087  0.5000  1
]