data_[Ca4Er4In4Hg4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ca  1.0000  1.8000  1.1400
  Er  1.2400  1.7500  1.0300
  In  1.7800  1.5500  0.9400
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [F-43m]
_cell_length_a [7.5475]
_cell_length_b [7.5475]
_cell_length_c [7.5475]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [216]
_chemical_formula_structural [CaErInHg]
_chemical_formula_sum '[Ca4 Er4 In4 Hg4]'
_cell_volume [429.9473]
_cell_formula_units_Z [4]
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
[
  Ca  Ca0  4  0.0000  0.0000  0.5000  1.0
  Er  Er1  4  0.0000  0.0000  0.0000  1.0
  In  In2  4  0.2500  0.2500  0.2500  1.0
  Hg  Hg3  4  0.2500  0.2500  0.7500  1.0
]