data_[K9Sm9Al3O24]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Sm  1.1700  1.8500  1.2290
  Al  1.6100  1.2500  0.6750
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [6.8890]
_cell_length_b [6.8890]
_cell_length_c [18.9025]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [K3Sm3AlO8]
_chemical_formula_sum '[K9 Sm9 Al3 O24]'
_cell_volume [776.9001]
_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
[
  K  K0  9  0.0000  0.5000  0.0000  1
  Sm  Sm1  9  0.0000  0.5000  0.5000  1
  Al  Al2  3  0.0000  0.0000  0.5000  1
  O  O3  18  0.0435  0.5218  0.2229  1
  O  O4  6  0.0000  0.0000  0.2298  1
]