data_[Na4Tc2Ni2O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Tc  1.9000  1.3500  0.7417
  Ni  1.9100  1.3500  0.7400
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [I4/m]
_cell_length_a [5.2588]
_cell_length_b [5.2588]
_cell_length_c [7.7627]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [87]
_chemical_formula_structural [Na2TcNiO6]
_chemical_formula_sum '[Na4 Tc2 Ni2 O12]'
_cell_volume [214.6785]
_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
[
  Na  Na0  4  0.0000  0.5000  0.2500  1
  Tc  Tc1  2  0.0000  0.0000  0.0000  1
  Ni  Ni2  2  0.0000  0.0000  0.5000  1
  O  O3  8  0.1842  0.6921  0.0000  1
  O  O4  4  0.0000  0.0000  0.2409  1
]