data_[Sn3Hg7]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sn  1.9600  1.4500  0.8300
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [P31m]
_cell_length_a [10.0363]
_cell_length_b [10.0363]
_cell_length_c [16.1713]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [157]
_chemical_formula_structural [Sn3Hg7]
_chemical_formula_sum '[Sn3 Hg7]'
_cell_volume [1410.6491]
_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
[
  Sn  Sn0  3  0.0000  0.4490  0.4511  1
  Hg  Hg1  6  0.1827  0.7548  0.5235  1
  Hg  Hg2  1  0.0000  0.0000  0.5060  1
]