data_[Ca2Ge2Pb2Se8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ca  1.0000  1.8000  1.1400
  Ge  2.0100  1.2500  0.7700
  Pb  2.3300  1.8000  1.1225
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [7.0551]
_cell_length_b [7.0118]
_cell_length_c [8.2473]
_cell_angle_alpha [90.0000]
_cell_angle_beta [107.0082]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [CaGePbSe4]
_chemical_formula_sum '[Ca2 Ge2 Pb2 Se8]'
_cell_volume [390.1426]
_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
[
  Ca  Ca0  2  0.2512  0.7500  0.5646  1.0
  Ge  Ge1  2  0.2378  0.2500  0.3107  1.0
  Pb  Pb2  2  0.2233  0.7500  0.0600  1.0
  Se  Se3  4  0.0026  0.5066  0.2554  1.0
  Se  Se4  2  0.4205  0.2500  0.1132  1.0
  Se  Se5  2  0.4227  0.2500  0.6002  1.0
]