data_[Sr4Mg1Hg5]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Mg  1.3100  1.5000  0.8600
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [P4/mmm]
_cell_length_a [3.9431]
_cell_length_b [3.9431]
_cell_length_c [19.5546]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [123]
_chemical_formula_structural [Sr4MgHg5]
_chemical_formula_sum '[Sr4 Mg1 Hg5]'
_cell_volume [304.0427]
_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
[
  Sr  Sr0  2  0.0000  0.0000  0.1871  1.0
  Sr  Sr1  2  0.0000  0.0000  0.3955  1.0
  Mg  Mg2  1  0.0000  0.0000  0.0000  1.0
  Hg  Hg3  2  0.5000  0.5000  0.0820  1.0
  Hg  Hg4  2  0.5000  0.5000  0.2907  1.0
  Hg  Hg5  1  0.5000  0.5000  0.5000  1.0
]