data_Si2C
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.95
_cell_length_b   2.95
_cell_length_c   8.58
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Si2C
_chemical_formula_sum   'Si4 C2'
_cell_volume   64.65
_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  Si2  1  0.0  0.7  0.64  1.0
  Si  Si3  1  0.47  0.85  0.35  1.0
  Si  Si4  1  0.47  0.85  0.94  1.0
  Si  Si5  1  0.0  0.7  0.23  1.0
  C  C0  1  0.0  0.0  0.44  1.0
  C  C1  1  0.0  0.0  0.15  1.0

data_Si2C
_symmetry_space_group_name_H-M   P1
_cell_length_a   2.95
_cell_length_b   2.95
_cell_length_c   8.58
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Si2C
_chemical_formula_sum   'Si4 C2'
_cell_volume   64.65
_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  1  0.0  0.7  0.23  1.0
  Si  Si1  1  0.0  0.7  0.64  1.0
  Si  Si2  1  0.47  0.85  0.35  1.0
  Si  Si3  1  0.47  0.85  0.94  1.0
  C  C4  1  0.0  0.0  0.15  1.0
  C  C5  1  0.0  0.0  0.44  1.0

Si Si Si Si C C
Si Si Si Si C C 0 4 o + o 0 2 o o o 1 3 o o o 1 4 o + o 1 4 + + o 2 5 o o + 2 5 o + + 2 5 + + + 2 3 o o + 2 3 + o + 2 2 + + o 2 2 o + o 2 2 + o o 3 5 o + o 3 4 o + o 