data_[Rb4Ac2Hg2Sb4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Ac  1.1000  1.9500  1.2600
  Hg  2.0000  1.5000  1.2450
  Sb  2.0500  1.4500  0.8300
]
_symmetry_space_group_name_H-M [Pmc2_1]
_cell_length_a [4.8982]
_cell_length_b [10.2377]
_cell_length_c [9.0426]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [26]
_chemical_formula_structural [Rb2AcHgSb2]
_chemical_formula_sum '[Rb4 Ac2 Hg2 Sb4]'
_cell_volume [453.4542]
_cell_formula_units_Z [2]
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  0.0000  0.1619  0.8671  1
  Rb  Rb1  2  0.5000  0.0842  0.5401  1
  Ac  Ac2  2  0.0000  0.4725  0.4870  1
  Hg  Hg3  2  0.5000  0.3159  0.1359  1
  Sb  Sb4  2  0.0000  0.1981  0.2692  1
  Sb  Sb5  2  0.5000  0.4045  0.7462  1
]