data_Cs(FeO2)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.59
_cell_length_b   6.59
_cell_length_c   6.59
_cell_angle_alpha   60.0
_cell_angle_beta   60.0
_cell_angle_gamma   60.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Cs(FeO2)2
_chemical_formula_sum   'Cs2 Fe4 O8'
_cell_volume   202.21
_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
  Cs  Cs0  1  0.0  0.0  0.0  1.0
  Cs  Cs1  1  0.33  0.33  0.33  1.0
  Fe  Fe2  1  0.49  0.49  0.82  1.0
  Fe  Fe3  1  0.82  0.49  0.49  1.0
  Fe  Fe4  1  0.49  0.82  0.49  1.0
  Fe  Fe5  1  0.82  0.82  0.82  1.0
  O  O6  1  0.77  0.55  0.55  1.0
  O  O7  1  0.77  0.77  0.77  1.0
  O  O8  1  0.55  0.77  0.55  1.0
  O  O9  1  0.09  0.09  0.88  1.0
  O  O10  1  0.55  0.55  0.77  1.0
  O  O11  1  0.09  0.88  0.09  1.0
  O  O12  1  0.88  0.88  0.88  1.0
  O  O13  1  0.88  0.09  0.09  1.0

data_Cs(FeO2)2
_symmetry_space_group_name_H-M   R3m
_cell_length_a   6.59
_cell_length_b   6.59
_cell_length_c   16.14
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   120.0
_symmetry_Int_Tables_number   160
_chemical_formula_structural   Cs(FeO2)2
_chemical_formula_sum   'Cs6 Fe12 O24'
_cell_volume   606.62
_cell_formula_units_Z   6
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-y, x-y, z'
  3  '-x+y, -x, z'
  4  '-y, -x, z'
  5  '-x+y, y, z'
  6  'x, x-y, z'
  7  'x+1/3, y+2/3, z+2/3'
  8  '-y+1/3, x-y+2/3, z+2/3'
  9  '-x+y+1/3, -x+2/3, z+2/3'
  10  '-y+1/3, -x+2/3, z+2/3'
  11  '-x+y+1/3, y+2/3, z+2/3'
  12  'x+1/3, x-y+2/3, z+2/3'
  13  'x+2/3, y+1/3, z+1/3'
  14  '-y+2/3, x-y+1/3, z+1/3'
  15  '-x+y+2/3, -x+1/3, z+1/3'
  16  '-y+2/3, -x+1/3, z+1/3'
  17  '-x+y+2/3, y+1/3, z+1/3'
  18  'x+2/3, x-y+1/3, z+1/3'
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
  Cs  Cs0  3  0.0  0.0  0.0  1.0
  Cs  Cs1  3  0.0  0.0  0.67  1.0
  Fe  Fe2  9  0.11  0.22  0.4  1.0
  Fe  Fe3  3  0.0  0.0  0.18  1.0
  O  O4  9  0.07  0.14  0.38  1.0
  O  O5  9  0.14  0.07  0.98  1.0
  O  O6  3  0.0  0.0  0.12  1.0
  O  O7  3  0.0  0.0  0.23  1.0

Cs Cs Fe Fe Fe Fe O O O O O O O O
Cs Cs Fe Fe Fe Fe O O O O O O O O 0 13 - o o 0 11 o - o 0 9 o o - 1 4 o - o 1 9 o o o 1 11 o o o 1 3 - o o 1 6 - o o 1 13 o o o 1 8 o - o 1 10 o o - 1 2 o o - 2 10 o o o 3 6 o o o 4 8 o o o 5 7 o o o 5 12 o o o 