data_[Pm8Cu8Tc8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Cu  1.9000  1.3500  0.8200
  Tc  1.9000  1.3500  0.7417
]
_symmetry_space_group_name_H-M [Fmmm]
_cell_length_a [4.5235]
_cell_length_b [6.8810]
_cell_length_c [17.3108]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [69]
_chemical_formula_structural [PmCuTc]
_chemical_formula_sum '[Pm8 Cu8 Tc8]'
_cell_volume [538.8275]
_cell_formula_units_Z [8]
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  8  0.0000  0.0000  0.3769  1
  Tc  Tc1  8  0.0000  0.1727  0.0000  1
  Cu  Cu2  8  0.2500  0.2500  0.2500  1
]