data_[Pm4Mn8O20]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Mn  1.5500  1.4000  0.6483
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [Cmcm]
_cell_length_a [4.1707]
_cell_length_b [9.2239]
_cell_length_c [9.5760]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [63]
_chemical_formula_structural [PmMn2O5]
_chemical_formula_sum '[Pm4 Mn8 O20]'
_cell_volume [368.3909]
_cell_formula_units_Z [4]
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
[
  Pm  Pm0  4  0.0000  0.4683  0.7500  1
  Mn  Mn1  8  0.0000  0.1498  0.5514  1
  O  O2  8  0.0000  0.0450  0.1212  1
  O  O3  8  0.0000  0.3426  0.0346  1
  O  O4  4  0.0000  0.2188  0.7500  1
]