data_[Er4Tl4Ag2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Er  1.2400  1.7500  1.0300
  Tl  1.6200  1.9000  1.3325
  Ag  1.9300  1.6000  1.0867
]
_symmetry_space_group_name_H-M [P4/mbm]
_cell_length_a [7.5723]
_cell_length_b [7.5723]
_cell_length_c [4.5233]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [127]
_chemical_formula_structural [Er2Tl2Ag]
_chemical_formula_sum '[Er4 Tl4 Ag2]'
_cell_volume [259.3637]
_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
[
  Er  Er0  4  0.1653  0.3347  0.5000  1
  Tl  Tl1  4  0.1416  0.6416  0.0000  1
  Ag  Ag2  2  0.0000  0.0000  0.0000  1
]