data_[Cs2Na2Be2I8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Cs  0.7900  2.6000  1.8100
  Na  0.9300  1.8000  1.1600
  Be  1.5700  1.0500  0.5900
  I  2.6600  1.4000  1.2733
]
_symmetry_space_group_name_H-M [P2_1/m]
_cell_length_a [7.4096]
_cell_length_b [8.1558]
_cell_length_c [10.2748]
_cell_angle_alpha [90.0000]
_cell_angle_beta [109.2170]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [11]
_chemical_formula_structural [CsNaBeI4]
_chemical_formula_sum '[Cs2 Na2 Be2 I8]'
_cell_volume [586.3217]
_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
[
  Cs  Cs0  2  0.2586  0.2500  0.0699  1
  Na  Na1  2  0.2256  0.2500  0.5533  1
  Be  Be2  2  0.2002  0.7500  0.3185  1
  I  I3  4  0.0081  0.0101  0.7176  1
  I  I4  2  0.3717  0.7500  0.1519  1
  I  I5  2  0.4205  0.7500  0.5505  1
]