data_[Rb4Ca2Be4Te8]
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
  Be  1.5700  1.0500  0.5900
  Te  2.1000  1.4000  1.2933
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [16.7064]
_cell_length_b [4.2905]
_cell_length_c [8.7221]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.9318]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Rb2Ca(BeTe2)2]
_chemical_formula_sum '[Rb4 Ca2 Be4 Te8]'
_cell_volume [587.7416]
_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  0.1276  0.0000  0.5388  1.0
  Ca  Ca1  2  0.0000  0.0000  0.0000  1.0
  Be  Be2  4  0.1737  0.5000  0.9718  1.0
  Te  Te3  4  0.0321  0.5000  0.7689  1.0
  Te  Te4  4  0.2080  0.0000  0.1512  1.0
]