data_[Pm6Si18H72]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Si  1.9000  1.1000  0.5400
  H  2.2000  0.2500  0.0000
]
_symmetry_space_group_name_H-M [R3c]
_cell_length_a [6.8523]
_cell_length_b [6.8523]
_cell_length_c [26.0352]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [161]
_chemical_formula_structural [Pm(SiH4)3]
_chemical_formula_sum '[Pm6 Si18 H72]'
_cell_volume [1058.6650]
_cell_formula_units_Z [6]
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  6  0.0000  0.0000  0.4271  1
  Si  Si1  18  0.0732  0.6780  0.5019  1
  H  H2  18  0.0022  0.4381  0.7256  1
  H  H3  18  0.1803  0.4098  0.9487  1
  H  H4  18  0.1971  0.4333  0.6625  1
  H  H5  18  0.2020  0.4348  0.8315  1
]