data_[Na4Sr2Hg2Sb4]
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
  Sb  2.0500  1.4500  0.8300
]
_symmetry_space_group_name_H-M [Pmc2_1]
_cell_length_a [4.8009]
_cell_length_b [9.2467]
_cell_length_c [8.1778]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [26]
_chemical_formula_structural [Na2SrHgSb2]
_chemical_formula_sum '[Na4 Sr2 Hg2 Sb4]'
_cell_volume [363.0363]
_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
[
  Na  Na0  2  0.0000  0.1700  0.3616  1.0
  Na  Na1  2  0.5000  0.0777  0.0373  1.0
  Sr  Sr2  2  0.0000  0.4436  0.9858  1.0
  Hg  Hg3  2  0.5000  0.3102  0.6448  1.0
  Sb  Sb4  2  0.0000  0.1517  0.7461  1.0
  Sb  Sb5  2  0.5000  0.3742  0.2699  1.0
]