data_[K4Pr2Be4O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Pr  1.1300  1.8500  1.0600
  Be  1.5700  1.0500  0.5900
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [13.2137]
_cell_length_b [3.3151]
_cell_length_c [7.5225]
_cell_angle_alpha [90.0000]
_cell_angle_beta [122.6500]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K2PrBe2O4]
_chemical_formula_sum '[K4 Pr2 Be4 O8]'
_cell_volume [277.4491]
_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
[
  K  K0  4  0.1318  0.0000  0.5712  1
  Pr  Pr1  2  0.0000  0.0000  0.0000  1
  Be  Be2  4  0.1769  0.5000  0.9554  1
  O  O3  4  0.0362  0.5000  0.7997  1
  O  O4  4  0.2169  0.0000  0.0904  1
]