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 [Pmn2_1]
_cell_length_a [6.2959]
_cell_length_b [5.3633]
_cell_length_c [4.9175]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [31]
_chemical_formula_structural [Li2SiNiO4]
_chemical_formula_sum '[Li4 Si2 Ni2 O8]'
_cell_volume [166.0515]
_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  0.2500  0.8283  0.9921  1.0
  Si  Si1  2  0.0000  0.3327  0.0023  1.0
  Ni  Ni2  2  0.0000  0.6758  0.4895  1.0
  O  O3  4  0.2151  0.1850  0.8961  1.0
  O  O4  2  0.0000  0.3332  0.3381  1.0
  O  O5  2  0.0000  0.6252  0.8940  1.0
]