data_[Na6Sr3Mn3F18]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sr  0.9500  2.0000  1.3200
  Mn  1.5500  1.4000  0.6483
  F  3.9800  0.5000  0.7050
]
_symmetry_space_group_name_H-M [R3]
_cell_length_a [5.8613]
_cell_length_b [5.8613]
_cell_length_c [15.5183]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [146]
_chemical_formula_structural [Na2SrMnF6]
_chemical_formula_sum '[Na6 Sr3 Mn3 F18]'
_cell_volume [461.7014]
_cell_formula_units_Z [3]
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  3  0.0000  0.0000  0.2871  1.0
  Na  Na1  3  0.0000  0.0000  0.7922  1.0
  Sr  Sr2  3  0.0000  0.0000  0.0041  1.0
  Mn  Mn3  3  0.0000  0.0000  0.4965  1.0
  F  F4  9  0.0080  0.7236  0.4037  1.0
  F  F5  9  0.0350  0.3378  0.5628  1.0
]