data_[Tl2Bi2As2O2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Tl  1.6200  1.9000  1.3325
  Bi  2.0200  1.6000  1.0350
  As  2.1800  1.1500  0.6600
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Pmc2_1]
_cell_length_a [4.7871]
_cell_length_b [6.8146]
_cell_length_c [6.1743]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [26]
_chemical_formula_structural [TlBiAsO]
_chemical_formula_sum '[Tl2 Bi2 As2 O2]'
_cell_volume [201.4179]
_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
[
  Tl  Tl0  2  0.5000  0.3341  0.0107  1
  Bi  Bi1  2  0.0000  0.2551  0.4473  1
  As  As2  2  0.0000  0.1609  0.8939  1
  O  O3  2  0.5000  0.3308  0.4021  1
]