data_[Sr2Nd1Hg3]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Nd  1.1400  1.8500  1.2765
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [P4/mmm]
_cell_length_a [3.9401]
_cell_length_b [3.9401]
_cell_length_c [11.8720]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [123]
_chemical_formula_structural [Sr2NdHg3]
_chemical_formula_sum '[Sr2 Nd1 Hg3]'
_cell_volume [184.3052]
_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  0.5000  0.5000  0.1708  1.0
  Nd  Nd1  1  0.5000  0.5000  0.5000  1.0
  Hg  Hg2  2  0.0000  0.0000  0.3480  1.0
  Hg  Hg3  1  0.0000  0.0000  0.0000  1.0
]