data_[Mg8Ti4Nb8O32]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Mg  1.3100  1.5000  0.8600
  Ti  1.5400  1.4000  0.8517
  Nb  1.6000  1.4500  0.8200
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/c]
_cell_length_a [19.0710]
_cell_length_b [5.9537]
_cell_length_c [5.2199]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.2494]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [15]
_chemical_formula_structural [Mg2TiNb2O8]
_chemical_formula_sum '[Mg8 Ti4 Nb8 O32]'
_cell_volume [592.6753]
_cell_formula_units_Z [4]
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
[
  Mg  Mg0  8  0.2274  0.3600  0.7426  1
  Ti  Ti1  4  0.0000  0.3681  0.7500  1
  Nb  Nb2  8  0.1165  0.1473  0.2494  1
  O  O3  8  0.0552  0.3714  0.0845  1
  O  O4  8  0.0671  0.1383  0.6042  1
  O  O5  8  0.1865  0.1010  0.9460  1
  O  O6  8  0.1905  0.3528  0.3817  1
]