data_[Rb2Tl2As2Se2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Tl  1.6200  1.9000  1.3325
  As  2.1800  1.1500  0.6600
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Cm]
_cell_length_a [8.0499]
_cell_length_b [5.6703]
_cell_length_c [6.4080]
_cell_angle_alpha [90.0000]
_cell_angle_beta [94.1395]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [8]
_chemical_formula_structural [RbTlAsSe]
_chemical_formula_sum '[Rb2 Tl2 As2 Se2]'
_cell_volume [291.7307]
_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
[
  Rb  Rb0  2  0.2311  0.0000  0.3359  1
  Tl  Tl1  2  0.0736  0.5000  0.7739  1
  As  As2  2  0.4557  0.5000  0.7607  1
  Se  Se3  2  0.3423  0.5000  0.1006  1
]