data_[Pm12Ge2Te6Se4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Ge  2.0100  1.2500  0.7700
  Te  2.1000  1.4000  1.2933
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [7.4599]
_cell_length_b [12.9096]
_cell_length_c [7.6843]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.8257]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Pm6GeTe3Se2]
_chemical_formula_sum '[Pm12 Ge2 Te6 Se4]'
_cell_volume [700.4391]
_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
[
  Pm  Pm0  8  0.2365  0.1633  0.2207  1
  Pm  Pm1  4  0.2478  0.5000  0.2213  1
  Ge  Ge2  2  0.0000  0.0000  0.0000  1
  Te  Te3  4  0.0000  0.1682  0.5000  1
  Te  Te4  2  0.0000  0.5000  0.5000  1
  Se  Se5  4  0.0000  0.3337  0.0000  1
]