data_[Mn4Nb4Zn4O18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Mn  1.5500  1.4000  0.6483
  Nb  1.6000  1.4500  0.8200
  Zn  1.6500  1.3500  0.8800
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P-3c1]
_cell_length_a [5.3216]
_cell_length_b [5.3216]
_cell_length_c [14.5921]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [165]
_chemical_formula_structural [Mn2Nb2Zn2O9]
_chemical_formula_sum '[Mn4 Nb4 Zn4 O18]'
_cell_volume [357.8759]
_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
[
  Mn  Mn0  4  0.3333  0.6667  0.5151  1
  Nb  Nb1  4  0.0000  0.0000  0.1416  1
  Zn  Zn2  4  0.3333  0.6667  0.7978  1
  O  O3  12  0.0263  0.3363  0.9146  1
  O  O4  6  0.0000  0.2863  0.2500  1
]