data_[Ac2Mn2Nb2O12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ac  1.1000  1.9500  1.2600
  Mn  1.5500  1.4000  0.6483
  Nb  1.6000  1.4500  0.8200
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [P4_2nm]
_cell_length_a [4.9786]
_cell_length_b [4.9786]
_cell_length_c [9.8640]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [102]
_chemical_formula_structural [AcMnNbO6]
_chemical_formula_sum '[Ac2 Mn2 Nb2 O12]'
_cell_volume [244.4957]
_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
[
  Ac  Ac0  2  0.0000  0.0000  0.0076  1
  Mn  Mn1  2  0.0000  0.0000  0.3349  1
  Nb  Nb2  2  0.0000  0.0000  0.6718  1
  O  O3  4  0.1628  0.8372  0.4936  1
  O  O4  4  0.2170  0.7830  0.1992  1
  O  O5  4  0.2208  0.7792  0.8001  1
]