data_[La4Mg2Nb2O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  La  1.1000  1.9500  1.1720
  Mg  1.3100  1.5000  0.8600
  Nb  1.6000  1.4500  0.8200
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P2_1/c]
_cell_length_a [5.7093]
_cell_length_b [5.7346]
_cell_length_c [9.8609]
_cell_angle_alpha [90.0000]
_cell_angle_beta [125.4398]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [14]
_chemical_formula_structural [La2MgNbO6]
_chemical_formula_sum '[La4 Mg2 Nb2 O12]'
_cell_volume [263.0338]
_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
[
  La  La0  4  0.2395  0.0562  0.7492  1.0
  Mg  Mg1  2  0.5000  0.0000  0.5000  1.0
  Nb  Nb2  2  0.0000  0.0000  0.0000  1.0
  O  O3  4  0.1488  0.2065  0.4462  1.0
  O  O4  4  0.2507  0.6957  0.4542  1.0
  O  O5  4  0.3437  0.0179  0.2492  1.0
]