data_[Na8Sr4Hg40]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sr  0.9500  2.0000  1.3200
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [Fmmm]
_cell_length_a [6.6773]
_cell_length_b [13.8887]
_cell_length_c [15.8449]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [69]
_chemical_formula_structural [Na2SrHg10]
_chemical_formula_sum '[Na8 Sr4 Hg40]'
_cell_volume [1469.4473]
_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
[
  Na  Na0  8  0.2500  0.0000  0.2500  1.0
  Sr  Sr1  4  0.0000  0.0000  0.0000  1.0
  Hg  Hg2  16  0.0000  0.1093  0.3896  1.0
  Hg  Hg3  16  0.0000  0.1697  0.1715  1.0
  Hg  Hg4  8  0.2500  0.2500  0.0000  1.0
]