data_[K4Be4O6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Be  1.5700  1.0500  0.5900
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/c]
_cell_length_a [4.9571]
_cell_length_b [8.2952]
_cell_length_c [6.3809]
_cell_angle_alpha [90.0000]
_cell_angle_beta [115.8636]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [K2Be2O3]
_chemical_formula_sum '[K4 Be4 O6]'
_cell_volume [236.0983]
_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  0.2158  0.1473  0.4252  1.0
  Be  Be1  4  0.3035  0.5087  0.5039  1.0
  O  O2  4  0.3879  0.5487  0.2977  1.0
  O  O3  2  0.0000  0.0000  0.0000  1.0
]