data_[Ba8Zr4Hg4Se20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ba  0.8900  2.1500  1.4900
  Zr  1.3300  1.5500  0.8600
  Hg  2.0000  1.5000  1.2450
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [Cmc2_1]
_cell_length_a [4.2165]
_cell_length_b [19.2191]
_cell_length_c [13.2941]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [36]
_chemical_formula_structural [Ba2ZrHgSe5]
_chemical_formula_sum '[Ba8 Zr4 Hg4 Se20]'
_cell_volume [1077.3095]
_cell_formula_units_Z [4]
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
[
  Ba  Ba0  4  0.0000  0.1167  0.6950  1.0
  Ba  Ba1  4  0.0000  0.1296  0.3096  1.0
  Zr  Zr2  4  0.0000  0.2138  0.0127  1.0
  Hg  Hg3  4  0.0000  0.4585  0.4491  1.0
  Se  Se4  4  0.0000  0.0721  0.0611  1.0
  Se  Se5  4  0.0000  0.2855  0.6483  1.0
  Se  Se6  4  0.0000  0.2995  0.3744  1.0
  Se  Se7  4  0.0000  0.3512  0.0064  1.0
  Se  Se8  4  0.0000  0.4965  0.7673  1.0
]