data_[K14Na4Hg4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Na  0.9300  1.8000  1.1600
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [Cmmm]
_cell_length_a [10.0643]
_cell_length_b [13.8124]
_cell_length_c [9.1119]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [65]
_chemical_formula_structural [K7(NaHg)2]
_chemical_formula_sum '[K14 Na4 Hg4]'
_cell_volume [1266.6668]
_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
[
  K  K0  8  0.2500  0.2500  0.2680  1.0
  K  K1  4  0.0000  0.5000  0.2316  1.0
  K  K2  2  0.0000  0.0000  0.0000  1.0
  Na  Na3  4  0.1654  0.0000  0.5000  1.0
  Hg  Hg4  4  0.0000  0.2809  0.0000  1.0
]