data_[Rb2Mg2Tl2F8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Mg  1.3100  1.5000  0.8600
  Tl  1.6200  1.9000  1.3325
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [I4mm]
_cell_length_a [4.1089]
_cell_length_b [4.1089]
_cell_length_c [14.2763]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [107]
_chemical_formula_structural [RbMgTlF4]
_chemical_formula_sum '[Rb2 Mg2 Tl2 F8]'
_cell_volume [241.0280]
_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  0.0000  0.0000  0.3480  1.0
  Mg  Mg1  2  0.0000  0.0000  0.0004  1.0
  Tl  Tl2  2  0.0000  0.0000  0.6454  1.0
  F  F3  4  0.0000  0.5000  0.0019  1.0
  F  F4  2  0.0000  0.0000  0.1425  1.0
  F  F5  2  0.0000  0.0000  0.8600  1.0
]