data_[Li4Be2Si2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Li  0.9800  1.4500  0.9000
  Be  1.5700  1.0500  0.5900
  Si  1.9000  1.1000  0.5400
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Pmn2_1]
_cell_length_a [5.6578]
_cell_length_b [5.3661]
_cell_length_c [4.7424]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [31]
_chemical_formula_structural [Li2BeSiO4]
_chemical_formula_sum '[Li4 Be2 Si2 O8]'
_cell_volume [143.9806]
_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
[
  Li  Li0  4  0.2490  0.6653  0.9904  1.0
  Be  Be1  2  0.0000  0.8462  0.5018  1.0
  Si  Si2  2  0.0000  0.1522  0.0006  1.0
  O  O3  4  0.2449  0.3055  0.9113  1.0
  O  O4  2  0.0000  0.1205  0.3472  1.0
  O  O5  2  0.0000  0.8763  0.8469  1.0
]