data_[K8Be4O8]
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 [C2/m]
_cell_length_a [11.7253]
_cell_length_b [5.1941]
_cell_length_c [8.4077]
_cell_angle_alpha [90.0000]
_cell_angle_beta [133.6560]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K2BeO2]
_chemical_formula_sum '[K8 Be4 O8]'
_cell_volume [370.4658]
_cell_formula_units_Z [4]
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  0.1329  0.0000  0.4612  1.0
  K  K1  4  0.2144  0.5000  0.8046  1.0
  Be  Be2  4  0.0275  0.5000  0.1451  1.0
  O  O3  4  0.0743  0.5000  0.3626  1.0
  O  O4  4  0.1417  0.5000  0.1001  1.0
]