data_[Na2Y1Hg1F8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Y  1.2200  1.8000  1.0400
  Hg  2.0000  1.5000  1.2450
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [P-1]
_cell_length_a [3.8865]
_cell_length_b [5.5759]
_cell_length_c [7.9271]
_cell_angle_alpha [93.1291]
_cell_angle_beta [90.0165]
_cell_angle_gamma [92.5221]
_symmetry_Int_Tables_number [2]
_chemical_formula_structural [Na2YHgF8]
_chemical_formula_sum '[Na2 Y1 Hg1 F8]'
_cell_volume [171.3630]
_cell_formula_units_Z [1]
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  0.4995  0.4956  0.7461  1.0
  Y  Y1  1  0.0000  0.0000  0.5000  1.0
  Hg  Hg2  1  0.0000  0.0000  0.0000  1.0
  F  F3  2  0.0188  0.7402  0.2777  1.0
  F  F4  2  0.0321  0.7909  0.7601  1.0
  F  F5  2  0.4397  0.2418  0.9887  1.0
  F  F6  2  0.4975  0.2265  0.4754  1.0
]