data_[K4Ba2Be4O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Ba  0.8900  2.1500  1.4900
  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 [13.6225]
_cell_length_b [3.4126]
_cell_length_c [7.5185]
_cell_angle_alpha [90.0000]
_cell_angle_beta [122.9623]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K2BaBe2O4]
_chemical_formula_sum '[K4 Ba2 Be4 O8]'
_cell_volume [293.2587]
_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  0.1241  0.0000  0.5772  1
  Ba  Ba1  2  0.0000  0.0000  0.0000  1
  Be  Be2  4  0.1744  0.5000  0.9374  1
  O  O3  4  0.0404  0.5000  0.7737  1
  O  O4  4  0.2208  0.0000  0.0996  1
]