data_[Li4Si2Ni2O8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Li  0.9800  1.4500  0.9000
  Si  1.9000  1.1000  0.5400
  Ni  1.9100  1.3500  0.7400
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Pc]
_cell_length_a [4.9290]
_cell_length_b [5.4791]
_cell_length_c [7.9346]
_cell_angle_alpha [90.0000]
_cell_angle_beta [128.1079]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [7]
_chemical_formula_structural [Li2SiNiO4]
_chemical_formula_sum '[Li4 Si2 Ni2 O8]'
_cell_volume [168.6142]
_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  2  0.5006  0.3503  0.4972  1.0
  Li  Li1  2  0.7523  0.1773  0.2499  1.0
  Si  Si2  2  0.9913  0.3283  0.9979  1.0
  Ni  Ni3  2  0.2450  0.1642  0.7388  1.0
  O  O4  2  0.0977  0.3858  0.4994  1.0
  O  O5  2  0.3165  0.1884  0.2176  1.0
  O  O6  2  0.6532  0.3210  0.9947  1.0
  O  O7  2  0.8842  0.1833  0.7807  1.0
]