data_[Be2Tl2Hg2As2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Be  1.5700  1.0500  0.5900
  Tl  1.6200  1.9000  1.3325
  Hg  2.0000  1.5000  1.2450
  As  2.1800  1.1500  0.6600
]
_symmetry_space_group_name_H-M [P4/nmm]
_cell_length_a [3.9882]
_cell_length_b [3.9882]
_cell_length_c [12.2848]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [129]
_chemical_formula_structural [BeTlHgAs]
_chemical_formula_sum '[Be2 Tl2 Hg2 As2]'
_cell_volume [195.3938]
_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
[
  Be  Be0  2  0.0000  0.0000  0.0000  1.0
  Tl  Tl1  2  0.0000  0.5000  0.2380  1.0
  Hg  Hg2  2  0.0000  0.0000  0.5000  1.0
  As  As3  2  0.0000  0.5000  0.8943  1.0
]