data_[Rb3Cu1Hg2Br8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Cu  1.9000  1.3500  0.8200
  Hg  2.0000  1.5000  1.2450
  Br  2.9600  1.1500  0.8825
]
_symmetry_space_group_name_H-M [P-3m1]
_cell_length_a [7.7952]
_cell_length_b [7.7952]
_cell_length_c [9.9467]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [164]
_chemical_formula_structural [Rb3Cu(HgBr4)2]
_chemical_formula_sum '[Rb3 Cu1 Hg2 Br8]'
_cell_volume [523.4385]
_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  2  0.3333  0.6667  0.3932  1.0
  Rb  Rb1  1  0.0000  0.0000  0.0000  1.0
  Cu  Cu2  1  0.0000  0.0000  0.5000  1.0
  Hg  Hg3  2  0.3333  0.6667  0.7954  1.0
  Br  Br4  6  0.1549  0.3097  0.6661  1.0
  Br  Br5  2  0.3333  0.6667  0.0547  1.0
]