data_[Rb1Cr2Ga1Hg1]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Cr  1.6600  1.4000  0.9400
  Ga  1.8100  1.3000  0.7600
  Hg  2.0000  1.5000  1.2450
]
_symmetry_space_group_name_H-M [P4/mmm]
_cell_length_a [5.2042]
_cell_length_b [5.2042]
_cell_length_c [5.4317]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [123]
_chemical_formula_structural [RbCr2GaHg]
_chemical_formula_sum '[Rb1 Cr2 Ga1 Hg1]'
_cell_volume [147.1105]
_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
[
  Rb  Rb0  1  0.5000  0.5000  0.5000  1
  Cr  Cr1  2  0.0000  0.5000  0.0000  1
  Ga  Ga2  1  0.0000  0.0000  0.0000  1
  Hg  Hg3  1  0.0000  0.0000  0.5000  1
]