data_[Rb4Ca2Hg4Te8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Rb  0.8200  2.3500  1.6600
  Ca  1.0000  1.8000  1.1400
  Hg  2.0000  1.5000  1.2450
  Te  2.1000  1.4000  1.2933
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [17.5308]
_cell_length_b [4.6563]
_cell_length_c [8.7555]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.4763]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2Ca(HgTe2)2]
_chemical_formula_sum '[Rb4 Ca2 Hg4 Te8]'
_cell_volume [677.8540]
_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  4  0.1259  0.0000  0.5654  1.0
  Ca  Ca1  2  0.0000  0.0000  0.0000  1.0
  Hg  Hg2  4  0.1639  0.5000  0.9818  1.0
  Te  Te3  4  0.0107  0.5000  0.7556  1.0
  Te  Te4  4  0.2045  0.0000  0.1909  1.0
]