data_CSe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.19
_cell_length_b   6.19
_cell_length_c   3.56
_cell_angle_alpha   93.44
_cell_angle_beta   93.44
_cell_angle_gamma   29.64
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CSe
_chemical_formula_sum   'C2 Se2'
_cell_volume   67.22
_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
  C  C0  1  0.6  0.0  0.8  1.0
  C  C1  1  0.15  0.0  0.75  1.0
  Se  Se2  1  0.15  0.0  0.5  1.0
  Se  Se3  1  0.6  0.0  0.05  1.0

data_CSe
_symmetry_space_group_name_H-M   P-1
_cell_length_a   3.17
_cell_length_b   3.56
_cell_length_c   6.19
_cell_angle_alpha   93.44
_cell_angle_beta   104.82
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   CSe
_chemical_formula_sum   'C2 Se2'
_cell_volume   67.22
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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
  Se  Se0  2  0.0  0.23  0.78  1.0
  C  C1  2  0.0  0.47  0.78  1.0

C C Se Se