data_[K4Be4F10]
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
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [8.3462]
_cell_length_b [4.3520]
_cell_length_c [9.6452]
_cell_angle_alpha [90.0000]
_cell_angle_beta [103.4745]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [K2Be2F5]
_chemical_formula_sum '[K4 Be4 F10]'
_cell_volume [340.6977]
_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  0.0793  0.5000  0.3114  1
  Be  Be1  4  0.1553  0.0000  0.9390  1
  F  F2  4  0.1281  0.0000  0.7821  1
  F  F3  4  0.1774  0.5000  0.9584  1
  F  F4  2  0.0000  0.0000  0.0000  1
]