data_[K28Na2Hg2]
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 [Amm2]
_cell_length_a [13.1785]
_cell_length_b [11.2239]
_cell_length_c [14.1200]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [38]
_chemical_formula_structural [K14NaHg]
_chemical_formula_sum '[K28 Na2 Hg2]'
_cell_volume [2088.5387]
_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  0.3022  0.1976  0.6300  1
  K  K1  4  0.0000  0.2137  0.8409  1
  K  K2  4  0.2329  0.0000  0.3328  1
  K  K3  4  0.2810  0.0000  0.9114  1
  K  K4  4  0.5000  0.2166  0.3797  1
  K  K5  2  0.0000  0.0000  0.1070  1
  K  K6  2  0.0000  0.0000  0.5737  1
  Na  Na7  2  0.5000  0.0000  0.1273  1
  Hg  Hg8  2  0.5000  0.0000  0.7424  1
]