data_[Eu4Er4Ag4Se12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Eu  1.2000  1.8500  1.1985
  Er  1.2400  1.7500  1.0300
  Ag  1.9300  1.6000  1.0867
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [17.8931]
_cell_length_b [4.0482]
_cell_length_c [8.5161]
_cell_angle_alpha [90.0000]
_cell_angle_beta [103.1055]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [EuErAgSe3]
_chemical_formula_sum '[Eu4 Er4 Ag4 Se12]'
_cell_volume [600.7992]
_cell_formula_units_Z [4]
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
[
  Eu  Eu0  4  0.1301  0.0000  0.0724  1
  Er  Er1  4  0.1661  0.0000  0.5910  1
  Ag  Ag2  4  0.0336  0.5000  0.7158  1
  Se  Se3  4  0.1709  0.5000  0.3576  1
  Se  Se4  4  0.1863  0.5000  0.8347  1
  Se  Se5  2  0.0000  0.0000  0.5000  1
  Se  Se6  2  0.0000  0.5000  0.0000  1
]