data_[Sr6Ga4Hg18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Ga  1.8100  1.3000  0.7600
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [4.9623]
_cell_length_b [10.7210]
_cell_length_c [14.1592]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [Sr3Ga2Hg9]
_chemical_formula_sum '[Sr6 Ga4 Hg18]'
_cell_volume [753.2829]
_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
[
  Sr  Sr0  4  0.0000  0.0000  0.2995  1
  Sr  Sr1  2  0.0000  0.0000  0.0000  1
  Ga  Ga2  4  0.0000  0.1850  0.5000  1
  Hg  Hg3  8  0.0000  0.2866  0.1401  1
  Hg  Hg4  8  0.0000  0.3643  0.3506  1
  Hg  Hg5  2  0.0000  0.5000  0.0000  1
]