data_CoPbSe2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.09
_cell_length_b   3.09
_cell_length_c   9.27
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   CoPbSe2
_chemical_formula_sum   'Co1 Pb1 Se2'
_cell_volume   88.36
_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
  Co  Co0  1  0.0  0.0  0.27  1.0
  Pb  Pb1  1  0.54  0.54  0.51  1.0
  Se  Se2  1  0.0  0.0  0.12  1.0
  Se  Se3  1  0.54  0.54  0.28  1.0

data_CoPbSe2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   4.37
_cell_length_b   4.37
_cell_length_c   9.27
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   CoPbSe2
_chemical_formula_sum   'Co2 Pb2 Se4'
_cell_volume   176.73
_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
  Co  Co0  2  0.0  0.0  0.27  1.0
  Pb  Pb1  2  0.04  0.5  0.51  1.0
  Se  Se2  2  0.0  0.0  0.12  1.0
  Se  Se3  2  0.04  0.5  0.28  1.0

Co Pb Se Se
Co Pb Se Se 0 2 o o o 0 3 o o o 0 3 o - o 0 3 - o o 0 3 - - o 1 3 o o o 2 3 - - o 